Ieuan ab Owain Glyndŵr was reputedly the

illegitimate Legitimacy, in traditional Western common law, is the status of a child born to parents who are legally married to each other, and of a child conceived before the parents obtain a legal divorce. Conversely, ''illegitimacy'', also known as ''b ...

son of

Owain Glyndŵr Owain ap Gruffydd (28 May 135420 September 1415), commonly known as Owain Glyndŵr (Glyn Dŵr, , anglicised as Owen Glendower) was a Welsh people, Welsh leader, soldier and military commander in the Wales in the late Middle Ages, late Middle ...

, the last native- Welsh

Prince of Wales Prince of Wales (, ; ) is a title traditionally given to the male heir apparent to the History of the English monarchy, English, and later, the British throne. The title originated with the Welsh rulers of Kingdom of Gwynedd, Gwynedd who, from ...

. The possibility of his existence was uncovered through the work of

Peter Bartrum Peter Clement Bartrum (4 December 1907 in Hampstead, London, England – 14 August 2008, in Hemel Hempstead, Hertfordshire, England) was a researcher and genealogist who, from the 1930s onwards, specialised in the genealogy of the Welsh nobility ...

which is currently being edited by the

University of Wales Aberystwyth Aberystwyth University () is a public research university in Aberystwyth, Wales. Aberystwyth was a founding member institution of the former federal University of Wales. The university has over 8,000 students studying across three academic facul ...

. Ieuan ab Owain and his descendants are detailed in ''Peniarth Manuscript 287'' in the hand o
Robert Vaughan of Hengwrt
(c.1592–1667) and also in the manuscript known as ''Harley 1969'' by Griffith Hughes (1634–1665) - the original manuscripts are kept at the

National Library of Wales The National Library of Wales (, ) in Aberystwyth is the national legal deposit library of Wales and is one of the Welsh Government sponsored bodies. It is the biggest library in Wales, holding over 6.5 million books and periodicals, and the l ...

Aberystwyth Aberystwyth (; ) is a University town, university and seaside town and a community (Wales), community in Ceredigion, Wales. It is the largest town in Ceredigion and from Aberaeron, the county's other administrative centre. In 2021, the popula ...

and the

British Library The British Library is the national library of the United Kingdom. Based in London, it is one of the largest libraries in the world, with an estimated collection of between 170 and 200 million items from multiple countries. As a legal deposit li ...

respectively. Ieuan, who is thought to have been born around 1380 and to have died around 1430, is thought to have had three sons: * Maredudd ab Ieuan ab Owain Glyndŵr *

Robert ab Ieuan ab Owain Glyndŵr The name Robert is an ancient Germanic given name, from Proto-Germanic "fame" and "bright" (''Hrōþiberhtaz''). Compare Old Dutch ''Robrecht'' and Old High German ''Hrodebert'' (a compound of '' Hruod'' () "fame, glory, honour, praise, reno ...

Iorwerth ab Ieuan ab Owain Glyndŵr Iorwerth () is a Welsh language, Welsh name, composed of two elements: meaning 'lord' and meaning 'fair', 'fine', or 'handsome'. (Both morphemes are somewhat archaic in Modern Welsh.) The name has historically been associated with the name Edward, ...

Manuscript sources

* Robert Vaughan of Hengwrt (1592–1667), ''Peniarth 287'' (folio 376), * * Griffith Hughes (1634–1665), ''Harley 1969'' (folio 19)

References

* P. C. Bartrum, ''Welsh Genealogies A.D. 300 – 1400'', 8 volumes (

University of Wales Press The University of Wales Press () was founded in 1922 as a central service of the University of Wales. The press publishes academic journals and around seventy books a year in the English and Welsh languages on six general subjects: history, poli ...

, Cardiff, 1974). Bleddyn ap Cynfyn 5; Bleddyn ap Cynfyn 5 (A) (pages 32 and 67) and P. C. Bartrum, Welsh Genealogies AD 1400-1500, 18 volumes (

, 1983).
The Bartrum Project, Department of Welsh, University of Wales, Aberystwyth
{{DEFAULTSORT:Ieuan ab Owain Glyndwr 1380s births 1430 deaths Welsh royalty