Greta \g-re-ta\ as a girl's name is pronounced GREH-tah. It is of German origin. Short form of Margaret (Greek) "pearl". Made famous by actress Greta Garbo. Marathon runner Greta Waitz.
Greta has 13 variant forms: Greeta, Gretal, Gretchen, Grete, Gretel, Gretha, Grethe, Grethel, Gretna, Gretta, Grette, Grietje and Gryta.