Nielsen Hayden genealogy
Owain ap Gruffudd ab Yr Arglwydd Rhys
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Name Owain ap Gruffudd ab Yr Arglwydd Rhys Gender Male Died 18 Jan 1236 Strata Florida Abbey, Ceredigion, Wales
[1] Buried Strata Florida Abbey, Ceredigion, Wales
[1] Person ID I26652 Ancestry of PNH, TNH, and others | Ancestor of TWK Last Modified 21 Dec 2019
Father Gruffudd ab Yr Arglwydd Rhys, d. 25 Jul 1201, Strata Florida Abbey, Ceredigion, Wales
Mother Matilda de Briouze, d. 29 Dec 1210, Llanbardarn Fawr, Ceredigion, Wales
Family ID F15929 Group Sheet | Family Chart
Family (Unknown daughter of Gwion Sais) Children + 1. Maredudd ab Owain ap Gruffudd ab Yr Arglwydd Rhys, d. Mar 1265, Llanbardarn Fawr, Ceredigion, Wales 
Last Modified 21 Dec 2019 Family ID F15928 Group Sheet | Family Chart
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Notes - "In 1233 he joined the Earl of Pembroke in reducing many English strongholds in Wales. Later he joined Maelgwn Fychan ap Maelgwn ap Rhys and Rhys Gryg in an attempt against Carmarthen Castle, but Henry Turberville arrived from Bristol with a large army and many ships. Turberville ran a vessel at high tide against a temporary bridge which had been built by the Welsh and broke it down, causing 300 of the Welsh to die." [Medieval Welsh Ancestors of Certain Americans, citation details below]
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Sources - [S3215] Medieval Welsh Ancestors of Certain Americans by Carl Boyer III. Santa Clarita, California, 2004.
- [S3215] Medieval Welsh Ancestors of Certain Americans by Carl Boyer III. Santa Clarita, California, 2004.