McCormack or McCormick is a surname that originated in Scotland and/or Ireland. Spelling variations include Cormack, MacCormack, McCormack, McCormick, MacCormick, Cormac, Cormach, Cormich, Cormiche and others. The surname likely comes from the first name of the original bearer. A person whose father was named Cormac would identify as Mac (i.e. "son of") Cormac. The combination Mac Cormac was probably continued as the family name by subsequent generations as surnames came into more general use. Scribes writing down what they heard as the surname likely introduced the spelling variations.