Welsh Caerfyrddin

← Proto-Celtic (inherited)

← Proto-Celtic *mori (mention)

← Proto-Celtic *dūnom (mention)

← Welsh caer (compound)

← Welsh Myrddin (compound)

← Welsh môr (mention)

← Welsh din (mention)

← Latin Moridūnum (cognate)

→ English Carmarthen (derived)

→ Welsh din (link)