D
Drennan
Drennan is a surname of Irish origin. Variations of the name are found primarily in Ireland, Scotland, and the United States. The surname is purportedly derived from the Gaelic Ó Droighneáin, Ó Draighnáin, or Ua Draighnen, meaning 'descendant of Draighnen', or 'descendant of blackthorn'. Variant spellings include Drennen, Drenning, Drennon, Drinan, Drinnan, Drinnon, and Drynan. Thornton is another Anglicized surname from the same original Gaelic form. == Background == The Irish Uí Draighnáins, a
