Þríhyrningshálsarnafnorð karlkyn · ÖrnefniFallbeygingarEt.eintalaFt.fleirtalaFleirtalaNf.nefnifallÞríhyrningshálsarÞf.þolfallÞríhyrningshálsaÞgf.þágufallÞríhyrningshálsumEf.eignarfallÞríhyrningshálsa