75% Irish 
12½% German 
6¼% Scottish 
6¼% Swiss 
The tree below shows the ancestors of Roger and Carroll Biggins Byrne.
Of the 64 great great great grandparents for Roger and Carroll, 48 are Irish, 8 are German, 4 are Scottish, and 4 are Swiss.
Their children, therefore, are 3/4ths Irish, 1/8th German, 1/16th Scottish, and 1/16th Swiss.
Through Y-chromosome DNA testing, the deep ancestry of five of the 32 great great great grandfathers have been identified through Y-chromosome DNA testing as descending from: Isles-Scot, Clan Colla, Old Saxony, Breassal Breac, and Niall of the Nine Hostages.
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