köken: From Middle High German grisgramen (“to grind one’s teeth”), from Old High German grisgramōn (“to grind one’s teeth”). Later reanalyzed as a compound gries (“grey”) + Gram (“grief”), which influenced the semantic development, though the first element is instead related to Grieß (“semolina, grit”).
köken: From Jörö-Jukka, the Finnish translation of the title of the famous children's book Struwwelpeter by Heinrich Hoffmann, equivalent to jörö + Jukka.