German Mahr

← English nightmare (cognate)

← Middle High German [[mar]], [[mare]] (inherited)

← Proto-West Germanic *marā (inherited)

← Old High German mara (inherited)

← Polish zmora (cognate)

← Old Irish Morrígan (cognate)

← Albanian tmerr (cognate)

→ English mare (mention)

→ German Nachtmahr (compound)