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About the Databases


At present there are 3 databases. The Surnames database consisting of over 4,500 Irish surname distribution maps. The data used to compile each image was obtained from the 1911 census of Ireland. The maps can be browsed alphabetically or you can enter a surname to search. The image will detail whether the surname is believed to be of Native Irish, Viking, Norman, Gallowglass, or later Scottish or English origin. If the surname is of Native Irish origin then details are provided on the estimated number of Clans that use a common surname, the location of the ‘Genetic Homelands,’ and where possible the known genetic cousins/related Clans. The surname distribtion maps should ONLY be used as a guide to locate a surname on the 2nd Edition of the Irish Medieval Surnames Map (CLICK HERE) or on the first ever Plantation Surnames (Scots-Irish) map (CLICK HERE). 

The Surnames database will be replaced in 2021 with more accurate 'farmer cluster' maps.

The second database is called the Clans and Castles database. There are over 400 Clans and Families that built nearly 1,400 Castles. Each image on that database details a surname distribution map together with the position of the Castles associated with that surname. The precise coordinates for all Castles can be found on the Castles of Ireland Map (CLICK HERE). There is also an interactive castles database which features each castle in Ireland that can be linked with a surname. You can zoom in and examine each of the 1,400 Castles that I have identified throughout Ireland. These Castle locations were used to reconstruct this Clan Map of Ireland (CLICK HERE).

English Origenes

Scottish Origenes