King of Munster Donnchad O'Brien 
1 He was an only child. He died in 1064 in San Stefano Rotondo Church, Rome, Italy.1
He had a biological daughter named Dearbforgail.
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Children
Dearbforgail O'Brien
Dearbforgail was born in 1005 in Leinster, Ireland.1 She died at the age of 75 in 1080.1
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