Þorsteinstungudalurnafnorð karlkyn · ÖrnefniFallbeygingarEt.eintalaFt.fleirtalaEintalaNf.nefnifallÞorsteinstungudalurÞf.þolfallÞorsteinstungudalÞgf.þágufallÞorsteinstungudalEf.eignarfallÞorsteinstungudals