Philosophy:Latin numerals (linguistics)
The Latin numerals are the words used to denote numbers within the Latin language. They are essentially based on their Proto-Indo-European ancestors, and the Latin cardinal numbers are largely sustained in the Romance Languages. In Antiquity and during the Middle Ages they were usually represented by Roman Numerals in writing.
Overview
The Latin language had several different sets of numerals used for various purposes. Some of those sets are shown in the tables below.
Cardinal numerals
The cardinal numerals are the ordinary numbers used for counting ordinary nouns ('one', 'two', 'three' and so on). The numbers ūnus, duo, trēs and the hundreds ducentī, trecentī, quadringentī etc. are adjectival, and have to agree with their nouns in case and gender. Mīlle (1000) is indeclinable in the singular; in the plural mīlia it is a declinable noun and the noun it refers to is put in the genitive, e.g. mīlia hostium 'thousands of enemies', quattuor mīlium 'of four thousand', cum tribus mīlibus equitum 'with three thousand cavalrymen'.
1 | I | ūnus, ūna, ūnum | 11 | XI | ūndecim | 21 | XXI | vīgintī et ūnus | 101 | CI | centum et ūnus |
2 | II | duo, duae, duo | 12 | XII | duodecim | 22 | XXII | vīgintī et duo | 200 | CC | ducentī, ducentae, ducenta |
3 | III | trēs, tria | 13 | XIII | trēdecim | 30 | XXX | trīgintā | 300 | CCC | trecentī, trecentae, trecenta |
4 | IV | quattuor | 14 | XIV | quattuordecim | 40 | XL | quadrāgintā | 400 | CD | quadringentī, quadringentae, quadringenta |
5 | V | quīnque | 15 | XV | quīndecim | 50 | L | quīnquāgintā | 500 | D | quīngentī, quīngentae, quīngenta |
6 | VI | sex | 16 | XVI | sēdecim | 60 | LX | sexāgintā | 600 | DC | sescentī, sescentae, sescenta |
7 | VII | septem | 17 | XVII | septendecim | 70 | LXX | septuāgintā | 700 | DCC | septingentī, septingentae, septingenta |
8 | VIII | octō | 18 | XVIII | duodēvīgintī | 80 | LXXX | octōgintā | 800 | DCCC | octingentī, octingentae, octingenta |
9 | IX | novem | 19 | XIX | ūndēvīgintī | 90 | XC | nōnāgintā | 900 | CM | nōngentī, nōngentae, nōngenta |
10 | X | decem | 20 | XX | vīgintī | 100 | C | centum | 1000 | M | mīlle |
The conjunction et between numerals can be omitted: vīgintī ūnus, centum ūnus. Et is not used when there are more than two words in a compound numeral: centum trīgintā quattuor. The word order in the numerals from 21 to 99 may be inverted: ūnus et vīgintī. Numbers ending in 8 or 9 are usually named in subtractive manner: duodētrīgintā, ūndēquadrāgintā. Numbers may either precede or follow their noun (see Latin word order).
- regnāvit Ancus annōs quattuor et vīgintī[1]
- 'Ancus reigned for 24 years'
Ordinal numerals
Ordinal numerals all decline like normal first- and second-declension adjectives. When declining two-word ordinals (thirteenth onwards), both words decline to match in gender, number and case.
- prīmus 'first'
- secundus 'second'
- tertius 'third'
- vīcēsimus/vīcēnsimus 'twentieth'
Note: secundus only means 'second' in the sense of 'following'. The adjective alter, altera, alterum meaning 'other [of two]' was more frequently used in many instances where English would use 'second'.
Ordinal numbers, not cardinal numbers, are commonly used to represent dates, because they are in the format of 'in the tenth year of Caesar', etc. which also carried over into the anno Domini system and Christian dating, e.g. annō post Christum nātum centēsimō for AD 100.
1 | I | prīmus | 11 | XI | ūndecimus | 21 | XXI | vīcēsimus prīmus | 101 | CI | centēsimus prīmus |
2 | II | secundus | 12 | XII | duodecimus | 22 | XXII | vīcēsimus secundus | 200 | CC | ducentēsimus |
3 | III | tertius | 13 | XIII | tertius decimus | 30 | XXX | trīcēsimus | 300 | CCC | trecentēsimus |
4 | IV | quārtus | 14 | XIV | quārtus decimus | 40 | XL | quadrāgēsimus | 400 | CD | quadringentēsimus |
5 | V | quīntus | 15 | XV | quīntus decimus | 50 | L | quīnquāgēsimus | 500 | D | quīngentēsimus |
6 | VI | sextus | 16 | XVI | sextus decimus | 60 | LX | sexāgēsimus | 600 | DC | sescentēsimus |
7 | VII | septimus | 17 | XVII | septimus decimus | 70 | LXX | septuāgēsimus | 700 | DCC | septingentēsimus |
8 | VIII | octāvus | 18 | XVIII | duodēvīcēsimus | 80 | LXXX | octōgēsimus | 800 | DCCC | octingentēsimus |
9 | IX | nōnus | 19 | XIX | ūndēvīcēsimus | 90 | XC | nōnāgēsimus | 900 | CM | nōngentēsimus |
10 | X | decimus | 20 | XX | vīcēsimus | 100 | C | centēsimus | 1000 | M | mīllēsimus |
- diē septimō pervēnit[2]
- 'he arrived on the seventh day'
Based on the ordinary ordinals is another series of adjectives: prīmārius 'of the first rank', secundārius 'of the second class, of inferior quality', tertiārius 'containing a third part', quārtārius 'a quarter, fourth part', quīntārius 'containing five parts', 'five-sixths', sextārius 'a one-sixth part of a measure', and so on.[3]
Plurale tantum numerals
Certain nouns in Latin were plurālia tantum, i.e. nouns that were plural but which had a singular meaning, for example litterae 'a letter', castra 'a camp', catēnae 'a set of chains', vestīmenta '(a set of) clothes', hibernae 'winter quarters', nūptiae 'wedding', quadrīgae 'quadriga' etc. A special series of numeral adjectives was used for counting these, namely ūnī, bīnī, trīnī, quadrīnī, quīnī, sēnī, and so on. Thus Roman authors would write: ūnae litterae 'one letter', trīnae litterae 'three letters', quīna castra 'five camps', etc.
Except for the numbers 1, 3, and 4 and their compounds, the plurale tantum numerals are identical with the distributive numerals (see below).
1 | I | ūnī | 11 | XI | ūndēnī | 21 | XXI | vīcēnī ūnī | 101 | CI | centēnī singulī |
2 | II | bīnī | 12 | XII | duodēnī | 22 | XXII | vīcēnī bīnī | 200 | CC | ducēnī |
3 | III | trinī | 13 | XIII | trinī dēnī | 30 | XXX | trīcēnī | 300 | CCC | trecēnī |
4 | IV | quadrīnī | 14 | XIV | quadrīnī dēnī | 40 | XL | quādrāgēnī | 400 | CD | quadringēnī |
5 | V | quīnī | 15 | XV | quīnī dēnī | 50 | L | quīnquāgēnī | 500 | D | quīngēnī |
6 | VI | sēnī | 16 | XVI | sēnī dēnī | 60 | LX | sexāgēnī | 600 | DC | sescēnī |
7 | VII | septēnī | 17 | XVII | septēnī dēnī | 70 | LXX | septuāgēnī | 700 | DCC | septingēnī |
8 | VIII | octōnī | 18 | XVIII | duodēvīcēnī | 80 | LXXX | octōgēnī | 800 | DCCC | octingēnī |
9 | IX | novēnī | 19 | XIX | ūndēvīcēnī | 90 | XC | nōnāgēnī | 900 | CM | nōngēnī |
10 | X | dēnī | 20 | XX | vīcēnī | 100 | C | centēnī | 1000 | M | mīllenī |
- non dīcimus bīga ūna, quadrīgae duae, nūptiae trēs, sed prō eō ūnae bīgae, bīnae quadrīgae, trīnae nūptiae (Varro)
- 'We don't say una biga (one two-horse chariot), duae quadrigae (two four-horse chariots), tres nuptiae (three weddings) but instead unae bigae, binae quadrigae, trinae nuptiae'.
- Tullia mea vēnit ad mē ... litterāsque reddidit trīnās (Cicero)[4]
- 'my daughter Tullia came to me ... and delivered (no fewer than) three letters'
- Octāvius quīnīs castrīs oppidum circumdedit (Caesar)[5]
- 'Octavius surrounded the town with five camps'
Distributive numerals
Another set of numeral adjectives, similar to the above but differing in the adjectives for 1, 3, and 4, were the distributive numerals: singulī, bīnī, ternī, quaternī, quīnī, sēnī, and so on. The meaning of these is 'one each', 'two each' (or 'in pairs') and so on, for example ibī turrīs cum ternīs tabulātīs ērigēbat 'there he began erecting towers with three storeys each' (Julius Caesar); bīnī senātōrēs singulīs cohortibus praepositī 'a pair of senators was put in charge of each group of soldiers' (Livy). In numbers 13 to 19, the order may be inverted, e.g. dēnī ternī instead of ternī dēnī[6]. The word singulī is always plural in this sense in the classical period:[7]
1 | I | singulī | 11 | XI | ūndēnī | 21 | XXI | vīcēnī singulī | 101 | CI | centēnī singulī |
2 | II | bīnī | 12 | XII | duodēnī | 22 | XXII | vīcēnī bīnī | 200 | CC | ducēnī |
3 | III | ternī | 13 | XIII | ternī dēnī | 30 | XXX | trīcēnī | 300 | CCC | trecēnī |
4 | IV | quaternī | 14 | XIV | quaternī dēnī | 40 | XL | quādrāgēnī | 400 | CD | quadringēnī |
5 | V | quīnī | 15 | XV | quīnī dēnī | 50 | L | quīnquāgēnī | 500 | D | quīngēnī |
6 | VI | sēnī | 16 | XVI | sēnī dēnī | 60 | LX | sexāgēnī | 600 | DC | sescēnī |
7 | VII | septēnī | 17 | XVII | septēnī dēnī | 70 | LXX | septuāgēnī | 700 | DCC | septingēnī |
8 | VIII | octōnī | 18 | XVIII | duodēvīcēnī | 80 | LXXX | octōgēnī | 800 | DCCC | octingēnī |
9 | IX | novēnī | 19 | XIX | ūndēvīcēnī | 90 | XC | nōnāgēnī | 900 | CM | nōngēnī |
10 | X | dēnī | 20 | XX | vīcēnī | 100 | C | centēnī | 1000 | M | mīllenī |
- lēgātī ternī in Āfricam ... et in Numidiam missī (Livy)[8]
- 'three ambassadors were sent to Africa, and three to Numidia'
- in singulōs equitēs ... nummōs quīnōs vīcēnōs dedērunt (Livy)[9]
- 'for each individual cavalryman they gave 25 coins'
From the distributive numerals are derived a series of adjectives singulārius 'unique', 'extraordinary', bīnārius 'consisting of two', ternārius 'consisting of three' etc.:
- exhērēdāta ab octōgēnāriō patre[10]
- 'disinherited by her 80-year-old father'
Adverbial numerals
Adverbial numerals are (as the name states) indeclinable adverbs, but because all of the other numeral constructions are adjectives, they are listed here with them. Adverbial numerals give how many times a thing happened. semel 'once', bis 'twice', ter 'thrice, three times', quater 'four times', and so on.
1 | I | semel | 11 | XI | ūndeciēns | 21 | XXI | vīciēns semel | 101 | CI | centiēns semel |
2 | II | bis | 12 | XII | duodeciēns | 22 | XXII | vīciēns bis | 200 | CC | ducentiēns |
3 | III | ter | 13 | XIII | trēdeciēns | 30 | XXX | trīciēns | 300 | CCC | trecentiēns |
4 | IV | quater | 14 | XIV | quattuordeciēns | 40 | XL | quadrāgiēns | 400 | CD | quadringentiēns |
5 | V | quinquiēns | 15 | XV | quīndeciēns | 50 | L | quīnquāgiēns | 500 | D | quīngentiēns |
6 | VI | sexiēns | 16 | XVI | sēdeciēns | 60 | LX | sexāgiēns | 600 | DC | sescentiēns |
7 | VII | septiēns | 17 | XVII | septendeciēns | 70 | LXX | septuāgiēns | 700 | DCC | septingentiēns |
8 | VIII | octiēns | 18 | XVIII | duodēvīciēns | 80 | LXXX | octōgiēns | 800 | DCCC | octingentiēns |
9 | IX | noviēns | 19 | XIX | ūndēvīciēns | 90 | XC | nōnāgiēns | 900 | CM | nōngentiēns |
10 | X | deciēns | 20 | XX | vīciēns | 100 | C | centiēns | 1000 | M | mīlliēns |
The suffix -iēns may also be spelled -iēs: quinquiēs, sexiēs, etc.
- equidem deciēs dīxī[11]
- 'I've said it ten times already'
Multiplicative numerals
Multiplicative numerals are declinable adjectives. simplex 'single', duplex 'double', triplex 'treble', quadruplex 'fourfold', and so on.
1 | I | simplex | 11 | XI | ūndecuplex | 21 | XXI | vīgentuplex simplex | 101 | CI | centuplex simplex |
2 | II | duplex | 12 | XII | duodecuplex | 22 | XXII | vīgentuplex duplex | 200 | CC | ducentuplex |
3 | III | triplex | 13 | XIII | trēdecuplex | 30 | XXX | trigintuplex | 300 | CCC | trecentuplex |
4 | IV | quadruplex | 14 | XIV | quattuordecuplex | 40 | XL | quadrāgintuplex | 400 | CD | quadringentuplex |
5 | V | quincuplex | 15 | XV | quīndecuplex | 50 | L | quīnquāgintuplex | 500 | D | quīngentuplex |
6 | VI | sextuplex | 16 | XVI | sēdecuplex | 60 | LX | sexāgintuplex | 600 | DC | sescentuplex |
7 | VII | septuplex | 17 | XVII | septendecuplex | 70 | LXX | septuāgintuplex | 700 | DCC | septingentuplex |
8 | VIII | octuplex | 18 | XVIII | duodēvīgentuplex | 80 | LXXX | octōgintuplex | 800 | DCCC | octingentuplex |
9 | IX | nōnuplex | 19 | XIX | ūndēvīgentuplex | 90 | XC | nōnāgintuplex | 900 | CM | nōngentuplex |
10 | X | decuplex | 20 | XX | vīgentuplex | 100 | C | centuplex | 1000 | M | mīlliplex |
These numerals decline as 3rd declension adjectives:
- [Caesar] triplicem aciem instruxit (Caesar)
- '(Caesar) arranged his soldiers in a triple line'
- tabellās duplicēs tenentem (Suetonius)
- 'holding a pair of writing tablets consisting of two leaves'
For completeness all the numbers have been given above. Not all of these numerals are attested in ancient books, however.
Based on this series of numerals there is a series of adverbs: simpliciter 'simply, frankly', dupliciter 'doubly, ambiguously', tripliciter 'in three different ways' etc., as well as verbs such as duplicāre 'to double', triplicāre 'to triple', quadruplicāre 'to make four times as much', and so on.[12]
Proportional numerals
Proportional numerals are declinable adjectives. simplus 'simple', duplus 'twice as great', triplus 'thrice as great', quadruplus 'four times as great', and so on.
1 | I | simplus | 11 | XI | ūndecuplus | 21 | XXI | vīgentuplus simplus | 101 | CI | centuplus simplus |
2 | II | duplus | 12 | XII | duodecuplus | 22 | XXII | vīgentuplus duplus | 200 | CC | ducentuplus |
3 | III | triplus | 13 | XIII | trēdecuplus | 30 | XXX | trīgintuplus | 300 | CCC | trecentuplus |
4 | IV | quadruplus | 14 | XIV | quattuordecuplus | 40 | XL | quadrāgintuplus | 400 | CD | quadringentuplus |
5 | V | quincuplus | 15 | XV | quīndecuplus | 50 | L | quīnquāgintuplus | 500 | D | quīngentuplus |
6 | VI | sextuplus | 16 | XVI | sēdecuplus | 60 | LX | sexāgintuplus | 600 | DC | sescentuplus |
7 | VII | septuplus | 17 | XVII | septendecuplus | 70 | LXX | septuāgintuplus | 700 | DCC | septingentuplus |
8 | VIII | octuplus | 18 | XVIII | duodēvīgentuplus | 80 | LXXX | octōgintuplus | 800 | DCCC | octingentuplus |
9 | IX | nōnuplus | 19 | XIX | ūndēvīgentuplus | 90 | XC | nōnāgintuplus | 900 | CM | nōngentuplus |
10 | X | decuplus | 20 | XX | vīgentuplus | 100 | C | centuplus | 1000 | M | mīlliplus |
These are often used as nouns: simplum 'the simple sum', duplum 'double the amount of money' and so on.[13]
- duplam pecūniam in thēsaurōs repōnī[14]
- 'double the amount of money should be replaced in the treasuries'
Partitive numerals
Partitives are declinable adjectives: singulārius 'of one part', 'singular', bīnārius 'of two parts', ternārius 'of three parts', quaternārius 'of four parts', and so on.
1 | I | singulārius | 11 | XI | ūndēnārius | 21 | XXI | vīcēnārius ūninārius | 101 | CI | centēnārius ūninārius |
2 | II | bīnārius | 12 | XII | duodēnārius | 22 | XXII | vīcēnārius bīnārius | 200 | CC | ducēnārius |
3 | III | ternārius | 13 | XIII | tredēnārius | 30 | XXX | trīcēnārius | 300 | CCC | trecēnārius |
4 | IV | quaternārius | 14 | XIV | quattuordēnārius | 40 | XL | quādrāgēnārius | 400 | CD | quadringēnārius |
5 | V | quīnārius | 15 | XV | quīndēnārius | 50 | L | quīnquāgēnārius | 500 | D | quīngēnārius |
6 | VI | sēnārius | 16 | XVI | sēdēnārius | 60 | LX | sexāgēnārius | 600 | DC | sescēnārius |
7 | VII | septēnārius | 17 | XVII | septendēnārius | 70 | LXX | septuāgēnārius | 700 | DCC | septingēnārius |
8 | VIII | octōnārius | 18 | XVIII | duodēvīcēnārius | 80 | LXXX | octōgēnārius | 800 | DCCC | octingēnārius |
9 | IX | novēnārius | 19 | XIX | ūndēvīcēnārius | 90 | XC | nōnāgēnārius | 900 | CM | nōngēnārius |
10 | X | dēnārius | 20 | XX | vīcēnārius | 100 | C | centēnārius | 1000 | M | mīllēnārius |
Some of these words have a particular meaning. The iambic sēnārius was a kind of metre consisting of six iambic feet commonly used in spoken dialogue in Roman comedy. There were also metres called the septēnārius and octōnārius (see Metres of Roman comedy).
The dēnārius was a silver coin originally worth ten assēs (but later eighteen assēs); but there was also a gold dēnārius, mentioned by Pliny the Elder and Petronius, worth 25 silver dēnāriī. The silver dēnārius is often mentioned in the New Testament, and was stated to be the day's pay in the parable of the Labourers in the Vineyard.[15]
Linguistic details
Cardinal Numbers
unus
The numeral ūnus < Old Latin oinos ‘one’, with its cognates Old Irish óen ‘one’, Gothic ains ‘one’, Ancient Greek οἴνη oínē ‘ace on dice’, and the first part of Old Church Slavonic inorogŭ ‘Unicorn’, hearkens back to Proto-Indo-European *Hoi̯-no-s. The genitive forms ūnīus, ūnĭus and the dative form ūnī match the pronominal declension (cf. hujus, illius etc.), the remaining forms (including a rare gen. f. ūnae) conform with those of first and second declension adjectives.[16][17] Nominative and accusative forms persist within the Romance languages as numeral and also in its secondarily acquired role as indefinite article, e. g. Old French and Occitan uns, une, un, Italian un, una, Spanish uno, una, Portuguese um, uma, Romanian un, o.[18]
duo
The masculine nominative/accusative forms dŭŏ < Old Latin dŭō ‘two’ is a cognate to Old Welsh dou ‘two’,[17] Greek δύω dýō ‘two’, Sanskrit दुवा duvā ‘two’, Old Church Slavonic dŭva ‘two’, that imply Proto-Indo-European *duu̯o-h1, a Lindeman variant of monosyllabic *du̯o-h1, living on in Sanskrit द्वा dvā ‘two’, and slightly altered in Gothic twai ‘two’, German zwei ‘two’ etc.; the feminine dŭae points to an ancestral form *duu̯ah2-ih1. Both forms bear a dual ending, which otherwise in Latin is preserved only in ambō ‘both’, and possibly in octō ‘eight’. The accusative forms dŭōs m., dŭās f., the genitive dŭom, classical dŭōrum m./n., dŭārum f., and the dative/ablative dŭōbus m./n., dŭābus f., are original Latin formations replicating nominal declension patterns; at times, duo stands in for other case forms, especially when combined with invariant numerals, e. g. duo et viginti ‘twenty-two’, duodetriginta ‘twenty-eight’.[16][19]
Most Romance languages sustain an invariant form developed from the masculine accusative duōs > Spanish, Catalan, Occitan dos, Portuguese dois, French deux, Romansh duos, dus; Italian due seems to preserve the feminine nominative duae (or may have evolved from the feminine accusative duas).[18]
tres
The masculine and feminine nominative form trēs ‘three’ and its cognates Gothic þreis ‘three’, Greek τρεῖς treîs ‘three’, Sanskrit त्रयः trayaḥ ‘three’ are based on Proto-Indo-European *trei̯-es; the original accusative form trīs, matching Umbrian trif, Gothic þrins, Old Irish trí,[17] Greek τρίνς tríns < Proto-Indo-European *tri-ns, was being superseded from preclassical Latin onward. The neuter tria corresponds to Umbrian triia and Greek τρία tría. The genitive trium is a direct descendant of Proto-Indo-European *trii̯-om, unlike e. g. Greek τριῶν triôn with long -ōn < -o-om, taken from the second declension; the dative/ablative form tribus, as well as Umbrian tris < *trifos, sustains Proto-Indo-European *tri-bʰos.[16][19] The Romance languages only preserve one invariant form reflecting Latin trēs > Spanish, Catalan, Occitan tres, Portuguese três, French trois, Romansh trais, treis, Romanian trei.[18]
quattuor
The invariant numeral quattuor ‘four’ does not fully correspond to any of its cognates in other languages, as Oscan petora ‘four’, Greek τέσσαρες téssares ‘four’, Old Irisch cethair ‘four’, Gothic fidwôr ‘four’, Lithuanian keturì ‘four’, Old Church Slavonic četyre ‘four’ point to a Proto-Indo-European base *kʷetu̯or-, that should appear as *quetuor in Latin; the actual -a- has been explained as epenthetic vowel emerging from a zero-grade *kʷtu̯or-. The geminate -tt- might have been established to compensate the fluctuating quality of succeeding -u- between non-syllabic glide and full vowel apparent since Old Latin; in the postclassical form quattor this sound is dropped altogether, and in most Romance languages the second syllable is subject to syncope, which then is compensated by an additional vowel at the very end of the word, as in Spanish cuatro, Portuguese quatro, Italian quattro, French, Occitan, Catalan quatre, Romanian patru.[16][19][18]
quinque
The cardinal number quīnque ‘five’, with its cognates Old Irish coíc ‘five’, Greek πέντε pénte ‘five’, Sanskrit पञ्च pañca ‘five’, leads back to Proto-Indo-European pénkʷe; the long -ī-, confirmed by preserved -i- in most Romance descendants, must have been transferred from the ordinal quīntus ‘fifth’, where the original short vowel had been regularly lengthened preceding a cluster with a vanishing fricative: quīntus < *quiŋxtos < *kʷuiŋkʷtos < *kʷeŋkʷ-to-s. The assimilation of antevocalic *p- to -kʷ- of the following syllable is a common feature of the Italic languages as well as the Celtic languages.[16][19]
References
- ↑ Livy, 1.35.1.
- ↑ Caesar, 1.10.4
- ↑ Definitions from Lewis and Short A Latin Dictionary.
- ↑ Cicero, Att. 11.17
- ↑ Caesar, B.C. 3.9
- ↑ C. G. Zumpt, "A Grammar of the Latin Language", 4th edition, 1836, translated by John Kenrick, p.73
- ↑ Lewis & Short, Latin Dictionary.
- ↑ Livy, 36.3
- ↑ Livy, 22.54
- ↑ Pliny, Letters, 6.33.2.
- ↑ Plautus, Amphitruo 575
- ↑ Lewis and Short, Latin Dictionary.
- ↑ Lewis and Short, Latin Dictionary.
- ↑ Livy, 29.19.
- ↑ e.g. Matt. 20' cf. Matt. 22.
- ↑ 16.0 16.1 16.2 16.3 16.4 Manu Leumann, Lateinische Laut- und Formenlehre, Reprint of the 5th ed. from 1926–1928, München 1977, §§ 163b/376/378.
- ↑ 17.0 17.1 17.2 Alexander Falileyev, Etymological Glossary of Old Welsh, Tübingen 2000, pp. 49/150/154.
- ↑ 18.0 18.1 18.2 18.3 Paul Georg Band, Zahlwörter im Sprachenvergleich. Ein Streifzug in die Geschichte der indogermanischen Sprachen an Hand ihrer Zahlwörter, Wien 1998, p. 12 f.
- ↑ 19.0 19.1 19.2 19.3 Gerhard Meiser, Historische Laut- und Formenlehre der lateinischen Sprache, Darmstadt 1998, §§ 72.2/88/116.