Easter \e(a)-ster, eas-ter\ as a girl's name is of Egyptian origin, and the meaning of Easter is "Christian spring festival". Holiday name used as a Christian name mainly in the 19th century. Also possibly a variant of Esther. A more common Eastertide name is the French Pascale.
Baby names that sound like Easter are Ester, Estera and Wister. Other similar baby names are Hester, Estel and Estee.