Type Word Usage Old Irish Meaning & History Old Irish word meaning "demon, evil spirit" [1] . Related ItemsFamily Tree ·Details Given Name DescendantsMorrígan, Mórríghan, Mór-Ríoghain (Irish Mythology) Same Spellingmór 1, mór 2, mor 1, mor 2, mor 4 Sources & ReferencesShow Inline Numbers Hide Inline Numbers Matasović, Ranko. Etymological Dictionary of Proto-Celtic. Brill, 2009, page 278. Share on Facebook Share on Twitter Entry updated May 26, 2026