Kingdom of Deheubart

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In 920 Hywel merged Seisyllwg with the Kingdom of Dyfed to form the new kingdom of Deheubarth.

Establishment

January 921: In 920 Hywel merged Seisyllwg with the Kingdom of Dyfed to form the new kingdom of Deheubarth.

Chronology

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1. Events

January 1042: Gruffydd defeated Hywel of Deheubart in the Battle of Pencader (1041).

August 1063: Following Gruffydd's death his realm was divided again into the traditional kingdoms.

Disestablishment

January 1198: On his death in 1197 Rhys redivided his kingdom among his several sons and none of them ever again rivalled his power. By the time Llywelyn the Great won the wars in Gwynedd, in the first half of the 12th century, lords in Deheubarth merely appear among his clients.