Historical biography archive · Updated 2026-11-03

Cadwallon Biography and Timeline

Follow Cadwallon through 6 dated historical records for Wales.

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Cadwallon, historical timeline

A chronological timeline drawn from matching World History Database records.

6Distinct records

1 of 1Page

620–985Years on this page

620 Succession

King · Gwynedd · House / House of Gwynedd

Succeeds as King of Gwynedd

Role range: 0620-0634

632

14 October 632

Battle of Hatfield Chase

King · Hatfield Chase · Warfare / Northumbria-Briton War

The forces of Penda of Mercia & Cadwallon defeat the Nortumbrian Army & kill Edwin

Role range: 0625-0633

633 Death of Cadwallon

King · House / House of Gwynedd

Death of Cadwallon, slain by Edwins nephew Oswald of Bernicia

Role range: 0625-0633

633

Assassination of Cadwallon

King · House / House of Northumbria

Death of Cadwallon, slain by Edwins nephew Oswald of Bernicia

Role range: 0625-0633

633

Battle of Heavenfield

King · Heavenfield · Warfare / Northumbria-Briton War

Victory by Oswald reunites Northumbria & destroys the British revival led by Gwynedd. Defeated & killed by Oswald who drives the Britons out of north east England

Role range: 0625-0633

985 Succession

Prince · House / House of Wales

Succeeds as Prince of Wales

Role range: 0985-0986

Records, sources and methodology

These dates and descriptions come from the historical_events database. Exact duplicate records have been collapsed. Names are grouped by the country, Name 2 and Name 1 fields; records with missing Name 2 cannot be reliably assigned to an individual biography. Check the underlying sources before formal citation.