Dexter m
English (mainly U.S.): transferred use of the surname. Although this is now a male given name, the word that gave rise to the surname originally denoted a female dyer, from Old English dēag dye + -estre feminine suffix of agent nouns. However, the distinction of gender was already lost in Middle English. The name coincides in form with Latin dexter right-handed, auspicious, and may sometimes have been chosen because of this.
First names dictionary. 2012.