Genealogy of O’Crowleys:

By Cork historian John T. Collins

DNA testing still shows link to families in Roscommon/Sligo/East Mayo.  The Crowley are a Sept of the McDermotts and came from that are to West Cork sometime after 1200.

 

https://photos.app.goo.gl/cmrqrYKfvcynkE1c6

 

 

 

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There is one further article I will try and locate

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