Nielsen Hayden genealogy
Ancestors of Dugal
┌── Gille-Adomnain
┌── Gille-Brigde
┌── Somerled, King of the Hebrides ( - 1164 Renfrew, Renfrewshire, Scotland)
│ ┌── Godred Crovan
│ ┌── Olaf of Man, King of Man and the Isles ( - 1153)
└── Ragnhild