Tomasine \t(o)-masi-ne, tom(a)-sine\ as a girl's name is a variant of Thomasina (Aramaic), and the meaning of Tomasine is "twin".

The baby name Tomasine sounds like Tamasine, Tomasina and Thomasine. Other similar baby names are Tamsine, Tamasin, Thomazine and Thomasin.