Gaulish cassanos

← Gaulish *cass- (mention)

← Proto-Celtic *kassos (inherited)

← Irish cas (cognate)

← Old Welsh cas (cognate)

→ English Chesney (derived)

→ French chêne (mention)

→ Old French chesne (derived)

→ Latin Carcaso (derived)

→ Occitan casse (derived)