Meaning and name origin
Thomasa \th(o)-ma-sa\ as a girl's name is of Aramaic origin, and the meaning of Thomasa is "twin". Thomasa is a variant of Thomasina (Aramaic): feminine of Thomas. Not consistently used as a given name.
Thomasa is not a popular first name for females and an equally uncommon surname or last name for all people (Source: 2000 U.S. Population Census).
Displayed below is the baby name popularity of the name Thomasa for girls. Thomasa has not been ranked in the Top 1000/100 so far. (Source: 2014 Birth Name Statistics).