Kearns, Kiernan, ó Ciaráin A Gaelic surname meaning descendant of Ciarán diminutive of ciar meaning ‘black’. A sept who were lords of Fearmhaigh, Tir Connell, Donegal. A sept who were originally seated in the barony of Imokilly in Cork. See also ó Céirín. In 1890 Kearns was principally found in Dublin and Mayo, and the estimated number of bearers was 3,900. In the United States Kerns is the 1,771st most numerous surname with an estimated 19,250 bearers.
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