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Definition 2024

filius

filius

Latin

Noun

fīlius m ‎(genitive fīliī); second declension

a son
Ubi est noster filius?
Where is our son?
(by extension) any male descendant
(in the plural) children

Inflection

Second declension.

Case	Singular	Plural
nominative	fīlius	fīliī
genitive	fīliī fīlī¹	fīliōrum
dative	fīliō	fīliīs
accusative	fīlium	fīliōs
ablative	fīliō	fīliīs
vocative	fīlī	fīliī

¹Found in older Latin (until the Augustan Age).

Note: Also vocative singular filie did appear.

Synonyms

natus

Derived terms

affiliare
affiliatio
fīlia
fīliolus
prōfīlius (Mediaeval Latin)

Related terms

fīliālis
fīliaster
fīliastra
fīlietās
fīliola

Descendants

Descendants

Corsican: figliu
Dalmatian: felj
Emilian: fiôl
Esperanto: filo
- Ido: filio
Interlingua: filio
Istriot: feîo, fèio
Italian: figlio
Mozarabic: filyo
Navarro-Aragonese:
- Aragonese: fillo
Novial: filio
Old French: fil, fis, fix, fiz
- English: Fitz-
- French: fils
- Norman: fils
Old Leonese:
- Asturian: fíu
- Leonese: fiyu
- Mirandese: filho
Old Portuguese: fillo
- Fala: fillu
- Galician: fillo
- Portuguese: filho
  - Indo-Portuguese: filh
  - Kabuverdianu: fidju

Old Provençal: filh
- Catalan: fill
- Occitan: filh
Old Spanish: fijo
- Extremaduran: iju
- Ladino: ijo / איז׳ו
- Spanish: hijo
  - Papiamentu: yiu
  - Tagalog: iho
Proto-Romanian:
- Aromanian: hilj, hiljiu
- Istro-Romanian: fiľ
- Megleno-Romanian: il'u
- Romanian: fiu
Rhaeto-Romance:
- Friulian: fi
- Romansch: figl, fegl
Sardinian:
- Campidanese: fillu
- Logudorese: fizu, figiu
Sicilian: figghiu
Venetian: fio, fiol

References

filius in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
filius in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
FILIUS in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition, 1883–1887)
Félix Gaffiot (1934), “filius”, in Dictionnaire Illustré Latin-Français, Paris: Hachette.