Hertha \he(r)-tha\ as a girl's name is of Old English origin, and the meaning of Hertha is "Earth". Name of the German or Scandinavian Earth Mother.
Hertha has 4 variant forms: Eartha, Erda, Ertha and Herta.
Baby names that sound like Hertha are Harriet, Harriot, Hariette and Harrietta.