Proto-Germanic *marǭ

→ English mare (inherited)

→ English mara (derived)

→ Bulgarian кошмар (derived)

→ French cauchemar (derived)

→ Macedonian кошмар (derived)

→ Dutch mare (inherited)

→ Norwegian Nynorsk muru (derived)

→ Old Norse mara (inherited)

→ Russian кошмар (derived)

→ Serbo-Croatian кошмар (derived)

→ Swedish mara (inherited)