Nielsen Hayden genealogy
Ancestors of Finn Ua Caillaide, King of (half of) Osraige
│ ┌── Cellach mac Cerbaill, King of Osraige ( - 908)
│ ┌── Donnchad mac Ceillaig, King of Osraige ( - 976)
│ ┌── Gilla Patraic mac Donnchada, King of Osraige ( - 996)
│ ┌── Tadg mac Gilla Patraic
└── Dirborgaill ingen Taidg ( - 1098)