Meaning and name origin
Kerrigan \k(e)-rri-gan\ as a boy's name is of Irish and Gaelic origin, and the meaning of Kerrigan is "black-haired". Kerrigan is a variant of Kerry (Irish, Gaelic): also the place name of the county in Ireland.
Kerrigan is not a popular first name for males but a very popular surname or last name for all people (#6433 out of 88799, Top 7%) (2000 U.S. Census).
Displayed below is a comparison of the popularity of the boy name Kerrigan and its source form. The only popular variation form ranked in the Top 1000/100 is Kerry. (2014 statistics).