Æthelfrith (disambiguation)
From Infogalactic: the planetary knowledge core
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
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