出典:Wiktionary
From Proto-West Germanic *hurnung, from Proto-Germanic *hurnungaz (“bastard”), cognate with Old High German hornung, Old Norse hornungr, Old Frisian horning, Frankish hōrni(n)g. Found in the compound hornungsunu (“bastard son”), as well as various toponyms such as Horninggesele (Horningsea), Horninggeshǣð (Horningsheath), Horningamǣre, and Horningdūn.