However, the Celts who lived along its coast referred to it as the Morimaru, the "dead sea", which was also taken up by the Germanic peoples, giving Morimarusa.
Con todo, os celtas que vivían ao longo da súa costa referíanse a el como o "Morimaru", ou o "mar morto", que tamén foi adoptado polos pobos xermanos, dando "Morimarusa".