From Proto-Celtic *bāus, said to be partly assimilated from words for cow and warrior. More at Boii.
Boiī m pl (genitive Boiōrum); second declension
- A Celtic tribe established between the Padus and the Apennines, in an area corresponding to today's Emilia-Romagna
- Ancient Greek: Βόιοι (Bóioi)
- Boii in William Smith, editor (1854, 1857) A Dictionary of Greek and Roman Geography, volume 1 & 2, London: Walton and Maberly
- Boii in Gaffiot, Félix (1934) Dictionnaire Illustré Latin-Français, Hachette
- Falileyev, Alexander, ed. (2007). "Boii." Dictionary of Continental Celtic Place-Names. Aberystwyth University.