"His year of birth is unknown, but a date in the 980s is likely, as it would accord with the political policy of his father at the time and mean that Donnchad was old enough to be militarily active in the 1010s, when he first appears in historical records.[3]"
He is married to Cacht ingen Ragnaill.
They got married in the year 1032.Source 2
Child(ren):
Donnchad mac Briain | ||||||||||||||||||||||||||||||||||
1032 | ||||||||||||||||||||||||||||||||||
Cacht ingen Ragnaill |