From Wiktionary, the free dictionary
Britannī m
- inflection of Britannus:
- genitive singular
- nominative/vocative plural
- “Britanni”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
- Britanni in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette.