Colton is a surname of mainly Irish origin. Mac Comhaltan Ua Cleirigh, King of Ui Uí Fiachrach aidhne IN ad 964 appears to be the first recorded use of this. name1] An English variation of the name is Colby; Irish variations include O'Comhaltain (Irish: O ó) comhaltain Comhaltáin, and collin Anglicized. as colton