Proto-Celtic *magos

→ English Gien (mention)

→ Welsh maes (mention)

→ Welsh -fa (inherited)

→ German Worms (derived)

→ French Rouen (derived)

→ Irish má (inherited)

→ Scottish Gaelic magh (inherited)

→ Latin Verona (mention)

→ Latin Noviomagus (mention)

→ Latin Borbetomagus (derived)

→ Latin Caesaromagus (derived)

→ Latin Rotomagus (mention)

→ Old Irish mag (inherited)