Thilda \th(il)-da\ as a girl's name is a variant of Tilda. See for origin and meaning of Thilda.
The baby name Thilda sounds like Thilde, Tildy and Tilde. Other similar baby names are Thida, Nilda, Hilda, Gilda, Thadda, Thada, Thalia, Thalya, Theda, Theida, Thelma and Wilda.