Meaning A girls name of Norwegian and Norse origin, it means "eternal; king's son." Origin of Grethe Norse , Scandinavian +-100%Zoom level changed to 1 Popular Middle Names Pronunciation 🔊 Listen Grethe Similar Names Frøydis Unn Gerd Gro Gry Gunda Gunnhild Guri Annikin Hjordis Year by Year Popularity of Grethe