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Birth:          1190 
Death:          1218 

Notes
www.familysearch.org
Chart of the Lords of the Manor of Deytheur, in "Collections Historical and 
Archaeological Relating to Montgomeryshire, vol 28"
https://en.wikipedia.org/wiki/Gwenwynwyn_ap_Owain
Gwenwynwyn ab Owain Cyfeiliog (died c. 1216) was the last major ruler of mid Wales 
before the completion of the Norman English invasion.
Lineage[edit]

He ruled southern Powys from 1195, having taken control following the death of his 
father Owain Cyfeiliog.

Conflict with Llywelyn the Great[edit]

His possession of Powys Wenwynwyn brought him into conflict with Llywelyn the 
Great, ruler of Gwynedd, who was keen to extend his own jurisdiction over the whole 
of Wales.

Conflict with King John[edit]

King John favoured Gwenwynwyn until a marriage alliance was made between 
Llywelyn and John's illegitimate daughter. The two native princes then kept their 
distance until 1208. As a result of Gwenwynwyn's activities, John confiscated his 
lands and allowed Llywelyn to appropriate Ceredigion and Powys.[citation needed]

Gwenwynwyn did not get his territory back for two years, but his resentment towards 
the English led him into an alliance with Llywelyn, which lasted from 1212 until 1216, 
when John restored some of Gwenwynwyn's property and the two Welsh princes fell 
out again.[citation needed]

Main events[edit]
1187 Attacks Carreghofa Castle at night with his brother Cadwallon, killing their uncle 
Owain Fychan
1195 Becomes ruler of Powys Wenwynwyn
c. 1198 Assists Maelgwn ap Rhys in taking Aberystwyth castle and capturing his 
brother Gruffydd ap Rhys II. Gwenwynwyn hands Gruffydd over to the English
c. 1198 Raises a large army and besieges Painscastle. Gruffydd, released by the 
English, engages Gwenwynwyn with a large force and defeats him.
c. 1202 Swears allegiance to Llywelyn the Great
1208 Arrested by King John and his lands annexed by Llywelyn.
c. 1210 Freed by John and recovers his possessions. He accompanies John on his 
expedition into Wales.
1211 Takes up arms for Llywelyn.
c. 1216 Deserts to John, pursued by Llywelyn who takes his lands, and takes refuge 
in Chester.[2]

Death and legacy[edit]

Llywelyn invaded Powys, and Gwenwynwyn is believed to have died or been killed 
that same year. He was survived by his son Gruffydd ap Gwenwynwyn whose actions 
in 1282 are blamed by many for the death of the last native prince of an independent 
Wales, Llywelyn ap Gruffudd.[citation needed]

Parents
AP GRUFFYDD Owain Cyfeilioc (ABT 1150 - 1197)
____ Gwenllian (1172 - )

Siblings
AP OWAIN CYFEILIOC Wenwynwyn (1190 - 1218)

Marriage To DE CORBET Margaret (ABT 1188 - ABT 1250)
    m.  

Notes

Parents
DE CORBET Robert II (ABT 1151 - 1222)
PANTULF Emma (ABT 1162 - )

Children by DE CORBET Margaret ABT 1188 - ABT 1250
AP WENWYNWYN Gruffydd (ABT 1210 - 1286)
OF POWIS Constance (ABT 1216 - )

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