Stakfellsvatnnafnorð hvorugkyn · ÖrnefniFallbeygingarEt.eintalaFt.fleirtalaEintalaNf.nefnifallStakfellsvatnÞf.þolfallStakfellsvatnÞgf.þágufallStakfellsvatniEf.eignarfallStakfellsvatns