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Grennan Family History

Grennan Surname Meaning

English (Lancashire of Norman origin): nickname for a man with a moustache from Old French gernon grenon ‘moustache’.

Irish (Offaly Westmeath and Down): shortened Anglicized form of Gaelic Ó Grianáin (see Greenan).

Source: Dictionary of American Family Names 2nd edition, 2022


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Where is the Grennan family from?

You can see how Grennan families moved over time by selecting different census years. The Grennan family name was found in the USA, the UK, Canada, and Scotland between 1841 and 1920. The most Grennan families were found in USA in 1920. In 1911 there were 17 Grennan families living in Ontario. This was about 50% of all the recorded Grennan's in Canada. Ontario had the highest population of Grennan families in 1911.
Use census records and voter lists to see where families with the Grennan 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 did your Grennan ancestors do for a living?

In 1921, Farmer was the top reported job for people in the Canada named Grennan. 50% of Grennan men worked as a Farmer.

View Census Data for Grennan | Data not to scale

*We display top occupations by gender to maintain their historical accuracy during times when men and women often performed different jobs.

Top Male Occupations In 1921

  • Farmer
    50%
  • Labourer
    50%

What Grennan family records will you find?

Census Records

There are 7,000 census records available for the last name Grennan. Like a window into their day-to-day life, Grennan census records can tell you where and how your ancestors worked, their level of education, veteran status, and more.

Search Canadian census records for Grennan

Passenger Lists

There are 1,000 immigration records available for the last name Grennan. Passenger lists are your ticket to knowing when your ancestors arrived in Canada, and how they made the journey - from the ship name to ports of arrival and departure.

View all Grennan immigration records

Draft Cards

There are 1,000 military records available for the last name Grennan. For the veterans among your Grennan ancestors, military collections provide insights into where and when they served, and even physical descriptions.

View all Grennan military records

You've only scratched the surface of Grennan family history

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What is the average Grennan lifespan?

Between 1957 and 2004, in the United States, Grennan life expectancy was at its lowest point in 1960, and highest in 1986. The average life expectancy for Grennan in 1957 was 60, and 75 in 2004.

View Social Security Death Index (SSDI) for Grennan

An unusually short lifespan might indicate that your Grennan 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.

Discover the unique achievements of ancestors in the Grennan family tree

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