Ó Maoilmhichil
Ó Maoilmhichil is an uncommon surname of Irish origin devolving into the common Irish surnames Mitchell and Mulvihill. The surname Mitchell is derived from the Sept or Clan name Uí Mhaoilmhichil which means Patrons or Devotees of Saint Michael the Archangel. As the English language began to replace Irish and Scottish Gaelic, the surname was anglicized as Mitchell, Michael, Mulvihill, Mulville, or Melville, and other variations. A family motto "Pro aris et focis" originates from the Irish family name "Mulvihill".