Grenishvammshryggurnafnorð karlkyn · ÖrnefniFallbeygingarEt.eintalaFt.fleirtalaEintalaNf.nefnifallGrenishvammshryggurÞf.þolfallGrenishvammshryggÞgf.þágufallGrenishvammshryggEf.eignarfallGrenishvammshryggjarGrenishvammshryggs