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Distribution of Surnames in Ireland

The Griffith Valuation was a survey done in the years from 1848-1864 of everyone who owned and/or rented land in Ireland. Since no census records of Ireland exist for this time period, Griffiths Valuation is the only way to learn who lived where at that time. As such, it represents our only snapshot of the population of Ireland in the years just after the famine.

That in itself makes the Valuation an important historical record. But it also turns out that it can give a picture of the settlement patterns of Ireland over many centuries previous to the Valuation. The Irish seem to have done a surprisingly small amount of moving around their island over the centuries. The grown children of each generation tended to settle within a few miles of the rest of the family. Therefore in places where the Griffith Valuation shows a clustering of a surname, it often turns out that the historical accounts of the surname's origins will mention that same area. This can to hold true for some settlements/invasions going back nearly 1000 years.


A few examples are shown below in links to distribution studies on several Irish surnames in my own lineage.

Garvey/McGarvey/Garvan

McAndrew

Cannon

McCann

Hanlon

McDermott

McManus

McLoughlin

Farrell

Greene

Kilgarriff


There are also interesting patterns to be seen in the distribution of given names in Ireland.




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