Meaning and Name Origin
Cormac \c(o)-rmac, cor-mac\ as a boys' name is pronounced KOR-mac. It is of Irish and Gaelic origin, and the meaning of Cormac is "impure son". Historical: the third-century Irish king who founded schools of military science, law, and literature at Tara. Saint Cormac (10th century), bishop and king of Munster, Ireland, was the author of a dictionary of the Irish language. The name has been popular in Ireland since the earliest times.
Cormac is an uncommon first name for men. Cormac is an equally unique last name for all people. (2000 U.S. Census)
Presented below is the birth name popularity of Cormac for boys. Cormac reached its top rank of #39 in Ireland in 2005, and is currently at #68. (2014 Birth Statistics)
Cormac is pronounced similarly to Cormic. Like Cormac, this name is not commonly used.