Harald Maddadsson, Earl of Orkney and Mormaer of Caithness (1139–1206)
Harald V of Norway | Harald Eia | Harald Hudak | Harald Bohr | Harald Schumacher | Harald Meier | Harald I | Harald Kloser | Harald Bluetooth | Harald Zwart | Harald Stormoen | Harald Penrose | Harald Moltke | Harald Helfgott | Harald Berg | Heinz-Harald Frentzen | Harald Welte | Harald Vogel | Harald Victor Hove | Harald Szeemann | Harald Schmid | Harald Prokop | Harald Nielsen | Harald Motzki | Harald Martenstein | Harald Hennum | Harald Haarmann | Harald Edelstam | Harald | Harald Tusberg |
According to some theory, this might have been a reference to St. George as the patron saint of England, since Mstislav's maternal grandfather was the last Anglo-Saxon king of that country, Harald II.