Olaf Sihtricsson King of Dublin
Olaf Sihtricsson King of was born about 1000 in Dublin, Ireland.  He died in 1034 in Slain by "Saxons" enroute to Rome on pilgrimage.¹ 

 Maelcorcre of Leinster
Maelcorcre of was born about 1000 in Leinster, Ireland.  Maelcorcre of is no longer alive.

 Ragnaillt O'Olaf of Dublin
Ragnaillt O'Olaf of was born about 1031 in Dublin, Ireland.