Namesakes
Irish Kings:
5 kings
King Domnall Ilchelgach 565-566 
King Domnall mac Áedo 628-642
King Domnall Midi 743-763
King Domnall ua Néill 956-980
King Domnall ua Lochlainn 1083-1121
Scottish Kings and Queens:
5 kings
King Domnall Brecc the Freckled 629-642
King Domnall Donn 688-696
King Domnall I 859-862
King Domnall II Dasachtach 889-900
King Domnall III Bane 1093-1094; 1094-1097