Ragnall Guthfrithsson, King of York

https://en.wikipedia.org/wiki/Ragnall_Guthfrithson

Ragnall Guthfrithson (d. 944?) was a Viking king who invaded England in 918. He was son of Gofraid ua Ímair, King of Dublin; his mother was an Englishwoman. He had several brothers, including Olaf, Albdan or Halfdene (d. 926) and Blacar (d. 948). The date of Ragnall's death is not known exactly, but he has been identified as the king of York mentioned in the Annals of Clonmacnoise as killed about 944 by the English.[1] Several of the Irish annals mention a son who was killed in 942.[2]

http://fmg.ac/Projects/MedLands/ENGLAND,%20AngloSaxon%20&%20Danish%...

 RÆGNALD Guthfrithson (-after 944).  After his cousin Olaf was deposed, he succeeded 942 as RÆGNALD II King of York.  He was expelled by Edmund King of Wessex in 944[1162].  Simeon of Durham records that King Edmund expelled "king…Anlaf the son of Sihtric and [king] Reignold the son of Guthferth" from Northumbria in 944[1163].  Florence of Worcester records that Eadmund King of Wessex expelled "duos reges, Anlafum regis…Sihtrici filium, et Reignoldum Guthferthi filium" from Northumbria, undated but dateable to [944] from the context[1164].