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Drennan Genealogy and Drennan Family History Information

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About the Drennan surname

Drennan is a surname of Irish origin and is derived from the Gaelic Ó Draighnáin. first found in co Galway the surname has many anglisized forms inclueding Drennan, O'Drennan, Drennen, Drenan, Drenen, Thornton, etc. noted family members inclued;

William Drennan (1754 – 1820) United Irishmen