O'callaghon Family History

There are 3K census records available for the last name O'callaghon. Like a window into their day-to-day life, O'callaghon census records can tell you where and how your ancestors worked, their level of education, veteran status, and more.

There are 642 immigration records available for the last name O'callaghon. Passenger lists are your ticket to knowing when your ancestors arrived in the UK, and how they made the journey - from the ship name to ports of arrival and departure.

There are 1K military records available for the last name O'callaghon. For the veterans among your O'callaghon ancestors, military collections provide insights into where and when they served, and even physical descriptions.