Nielsen Hayden genealogy
Ancestors of Gormlaith ingen Finn Ua Caellaide
│ │ ┌── Donnchad mac Ceillaig, King of Osraige ( - 976) =>
│ │ ┌── Gilla Patraic mac Donnchada, King of Osraige ( - 996)
│ │ ┌── Tadg mac Gilla Patraic
│ └── Dirborgaill ingen Taidg ( - 1098)
│