from Old Welsh Morcant, possibly from *mor (“sea”) (Welsh môr) or *mọr (“great”) (Old Welsh maur) + *kantos (“circle”) (Welsh cant), meaning “great chief” or “sea chief”.
Borrowed from Irish Bréanainn (via Latin Brendanus), from Old Irish Brénainn, from Old Welsh breenhin (“prince, king”), ultimately from Proto-Celtic *brigantīnos (“(someone)…
from Old Welsh Morcant, possibly from *mor (“sea”) (Welsh môr) or *mọr (“great”) (Old Welsh maur) + *kantos (“circle”) (Welsh cant), meaning “great chief” or “sea chief”.