Family History and Genealogy Resources by Surname

O'Callaghan Surname Origin

(Origin Celtic or Gaelic) The descendants or tribe of Callaghan, from Ciallach, prudent, judicious, discreet.

Source: An Etymological Dictionary of Family and Christian Names With an Essay on their Derivation and Import; Arthur, William, M.A.; New York, NY: Sheldon, Blake, Bleeker & CO., 1857.




O'Callaghan  Surname Meaning and Family Facts

O'Callaghan Last Name Meaning
Search the FREE Ancestry.com Name Dictionary.




There is more to O'Callaghan family history than the origin of your surname:

Start your Genealogy to find your personal O'Callaghan family ancestry. It's easy to get started. Just begin your family tree with what you already know. Learn More.




A O'Callaghan Family History Thought:

'Every man is his own ancestor, and every man his own heir. He devises his own future, and he inherits his own past.' -- H. F. Hedge




To find additional surnames, choose the first letter of surname:
A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z