Meaning and name origin
Thomasina \th(o)-masi-na, thom(a)-sina\ as a girl's name is pronounced TAH-ma-SEE-nah. It is of Aramaic origin, and the meaning of Thomasina is "twin". Feminine of Thomas. Thomasin was the earliest form, followed by Thomasina in the Victorian era, and Tamsin a century later. The original Greek form of this name, Didymos, began as a nickname for one of the twelve disciples of Jesus in the Christian scriptures. See also Tamsyn and Tammy.
There is 1 masculine form of Thomasina: Tamson.
Thomasina is a very popular first name for females (#1839 out of 4276, Top 43%) but an uncommon surname or last name for all people (Source: 2000 U.S. Population Census).
Displayed below is a comparison of the popularity of the girl name Thomasina and its variant forms. Popular variation forms ranked in the Top 1000/100 are Tommie, Thomas, Tammy, Tammie and Tammi. (Source: 2014 Birth Name Statistics).