Feminine form of Thomas; Thomasyn is an Elizabethan variant. Other forms include Thomasin and Thomasina. Note: another user erased the useful information above and replaced it with a claim that Thomasyn is a modern invention; I reverted the change.
Thomasyn is baby girl name mainly popular in Christian religion and its main origin is . Thomasyn name meanings is A twin. Other similar sounding names can be Thomasina.