[3] grunnungr (m.) ‘shallows-dweller’: The name refers to a fish that lives in shallow waters, perhaps a small cod (from grunn ‘shallows’ or grunnr ‘bottom of the sea’, hence lit. ‘groundling’, ModNorw. taretorsk). See Nordgaard (1912, 62). ModIcel. grunnungur is ‘tench’ (Tinca tinca), a freshwater fish of the carp family.