[PAR] [TLE] Alhfrith [SEP] Alhfrith or Ealhfrith (c. 630 – c. 664) was King of Deira under his father Oswiu, King of Bernicia, from 655 until sometime after 664.  Appointed by Oswiu as a subordinate ruler, Alhfrith apparently clashed with his father over religious policy, which came to a head at the Synod of Whitby in 664.  After this, Alhfrith disappears from the historical record. [PAR] [TLE] Oswiu [SEP] Oswiu, also known as Oswy or Oswig (Old English: "Ōswīg" ) (c. 612 – 15 February 670), was King of Bernicia from 642 until his death.  One of the sons of Æthelfrith of Bernicia, he became king following the death of his brother Oswald in 642.  Unlike Oswald, Oswiu struggled to exert authority over Deira, the other constituent kingdom of medieval Northumbria, for much of his reign.
[PAR] [TLE] Alhfrith [ SEP ] Alhfrith or Ealhfrith ( c. 630 – c. 664 ) was King of Deira under his father Oswiu , King of Bernicia , from 655 until sometime after 664 . Appointed by Oswiu as a subordinate ruler , Alhfrith apparently clashed with his father over religious policy , which came to a head at the Synod of Whitby in 664 . After this , Alhfrith disappears from the historical record . [PAR] [TLE] Oswiu [ SEP ] Oswiu , also known as Oswy or Oswig ( Old English : " Ōswīg " ) ( c. 612 – 15 February 670 ) , was King of Bernicia from 642 until his death . One of the sons of Æthelfrith of Bernicia , he became king following the death of his brother Oswald in 642 . Unlike Oswald , Oswiu struggled to exert authority over Deira , the other constituent kingdom of medieval Northumbria , for much of his reign .
Alhfrith was King of Deira under his father, who was King of Bernicia following the death of which brother in 642?
Alhfrith was King of Deira under his father , who was King of Bernicia following the death of which brother in 642 ?
Oswald
Oswald