What is "aethelfrith"

Æthelfrith (died c. 616) was King of Bernicia from c. 593 until his death. Around 604 he became the first Bernician king to also rule the neighboring land of Deira, giving him an important place in the development of the later kingdom of Northumbria. He was especially notable for his successes against the Britons and his victory over the Gaels of Dál Riata. Although he was defeated and killed in battle and replaced by a dynastic rival, his line was eventually restored to power in the 630s.

Æthelfrith (d. c. 616) was King of Bernicia and Deira in northern England.

Æthelfrith or Aethelfrith may also refer to:

• Æthelfrith of Elmham (d. c. 745), Bishop of Elmham
• Æthelfrith of Mercia (fl. 883 – 915), Ealdorman in Mercia