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O'callaghan Family History

O'callaghan Surname Meaning

Irish: from Gaelic Ó Ceallacháin ‘descendant of Ceallachán’, a diminutive of the personal name Ceallach, possibly meaning ‘lover of churches’, from ceall ‘church’, or (more likely) ‘bright-headed’, from cen ‘head’ + lach ‘light’.

This name was borne by a 10th-century king of Munster, from whom many present-day bearers of the surname claim descent.

Source: Dictionary of American Family Names ©2013, Oxford University Press


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Where is the O'callaghan family from?

You can see how O'callaghan families moved over time by selecting different census years. The O'callaghan family name was found in the USA, the UK, and Scotland between 1880 and 1920. The most O'callaghan families were found in USA in 1880. In 1891 there were 7 O'callaghan families living in Yorkshire. This was 100% of all the recorded O'callaghan's in United Kingdom. Yorkshire had the highest population of O'callaghan families in 1891.
Use census records and voter lists to see where families with the O'callaghan surname lived. Within census records, you can often find information like name of household members, ages, birthplaces, residences, and occupations.
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What O'callaghan family records will you find?

Census Records

There are 46,000 census records available for the last name O'callaghan. Like a window into their day-to-day life, O'callaghan census records can tell you where and how your ancestors worked, their level of education, veteran status, and more.

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Passenger Lists

There are 10,000 immigration records available for the last name O'callaghan. 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.

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Draft Cards

There are 5,000 military records available for the last name O'callaghan. For the veterans among your O'callaghan ancestors, military collections provide insights into where and when they served, and even physical descriptions.

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What is the average O'callaghan lifespan?

Between 1992 and 2003, in the United States, O'callaghan life expectancy was at its lowest point in 1996, and highest in 1998. The average life expectancy for O'callaghan in 1992 was 45, and 54 in 2003.

View Social Security Death Index (SSDI) for O'callaghan

An unusually short lifespan might indicate that your O'callaghan ancestors lived in harsh conditions. A short lifespan might also indicate health problems that were once prevalent in your family. The SSDI is a searchable database of more than 70 million names. You can find birthdates, death dates, addresses and more.

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