köken: From Middle High German alb, alp, from Old High German alp, from Proto-West Germanic *albi, from Proto-Germanic *albiz, ultimately from Proto-Indo-European *albʰós. Doublet of Elf, borrowed from English later.
Mara: a Buddhist demon that personifies the "death" of spiritual life · penis
köken: From Middle Chinese 魔羅 (ma la), in turn a transcription of Sanskrit मार (Māra, “the Destroyer, the Evil One”). The kanji are phonetic ateji (当(あ)て字(じ)) applied when transcribing the Sanskrit into Middle Chinese. The shift from "Buddhist evil demon" to "penis" was originally slang use among monks, in reference to sexual desires distracting one from the path to enlightenment. Some sources link this…
köken: Borrowed into Western Finnish dialects from Swedish mara, which is a demon that sits on the chest of a sleeping person and causes bad dreams. This demon is known by similar names among Germanic peoples and lives in English nightmare, in Swedish mardröm (“nightmare”) and in German Nachtmahr (“nightmare”), among others.