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Cosnahan Family History

Cosnahan Surname Meaning

from a byname based on a diminutive of cosnach ‘defender’; compare Irish Cushnahan.

Source: The Oxford Dictionary of Family Names in Britain and Ireland, 2016


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Where is the Cosnahan family from?

You can see how Cosnahan families moved over time by selecting different census years. The Cosnahan family name was found in the USA, and the UK between 1880 and 1920. The most Cosnahan families were found in USA in 1880. In 1880 there were 4 Cosnahan families living in South Carolina. This was about 44% of all the recorded Cosnahan's in USA. South Carolina had the highest population of Cosnahan families in 1880.
Use census records and voter lists to see where families with the Cosnahan 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 Cosnahan family records will you find?

Census Records

There are 328 census records available for the last name Cosnahan. Like a window into their day-to-day life, Cosnahan census records can tell you where and how your ancestors worked, their level of education, veteran status, and more.

Search Canadian census records for Cosnahan

Passenger Lists

There are 81 immigration records available for the last name Cosnahan. 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.

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Draft Cards

There are 146 military records available for the last name Cosnahan. For the veterans among your Cosnahan ancestors, military collections provide insights into where and when they served, and even physical descriptions.

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What is the average Cosnahan lifespan?

Between 1960 and 2004, in the United States, Cosnahan life expectancy was at its lowest point in 1965, and highest in 1983. The average life expectancy for Cosnahan in 1960 was 43, and 50 in 2004.

View Social Security Death Index (SSDI) for Cosnahan

An unusually short lifespan might indicate that your Cosnahan 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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