Thadda \th(ad)-da\ as a girl's name is a variant of Thaddea (Aramaic), and the meaning of Thadda is "heart".

The baby name Thadda sounds like Thada and Tadda. Other similar baby names are Shadia, Shayda, Thandy, Thaddie, Thadee, Tada, Thaisa, Thalia, Thana, Theda, Thida, Theida and Thilda.