Ellis ap Griffith (c.1440 – 1489) or Elissau ap Gruffudd, was the Baron of Gwyddelwern in Denbighshire, Wales, and the Governor of Penllyn. His granduncle was Owen Glendower, Prince of Wales. Following his family defeat during the Glyndwr Rising, his branch inherited the co-representation of the Royal House of Powys, and were immortalized by William Shakespeare in the history play Henry IV. Through his mother Lowrie, he inherited the lordship of his grandfather, Tudor Glendower, and by marriage, the estate of Plas-yn-Yale. By this union, he became the founder of the House of Yale, represented by the Yale family, later known in America as the benefactors of Yale University.
His granduncle Owain Glendower, Prince of Wales, and other family members, launched the Glyndwr Rising against the Lancasters, in alliance with their kinsmen; the Percys, Mortimers, and Tudors of Penmynydd. Having lost the last Welsh War of Independence, Ellis's family were either killed at battle, imprisoned, or merciless put to death, and lost much of their estates and castles.
His mother Lowrie inherited the royal claims after the fall of the Royal House of Mathrafal, and transmitted to Ellis the lordship of Gwyddelwern from his grandfather. His family would later be featured in William Shakespeare's play Henry IV, Part 1 and Part 2, along Shakespeare's Henriad, with his granduncle being the rebel character Owen Glendower.
Ellis ap Griffith founded the House of Yale circa 1480, when he married Margaret, daughter of Jenkyn of Allt Llwyn Dragon (Dragon's Grove Hill), renamed Plas-yn-Yale. Through Ellis's mother Lowrie, the Yale family became cadets and co-representatives of four royal houses as co-heirs of Prince Owain Glyndwr, last Welsh Prince of Wales, along with the Hughes of Gwerclas. The name was adopted from the Lordship of Yale, previously the commote of Iâl in Welsh, which had belonged to his mother's family through four subsequent royal families, being those of Cunedda, Gwynedd, Dinefwr, and Mathrafal, since the foundation of the Kingdom of Gwynedd by their Romano-British ancestor Cunedda, its founding King in late Roman Britain. By this union came the usage of the Yale name as a surname, adopted from the maternal side, a practice that was adopted later by Chancellor Thomas Yale, first of the name.
Over time, the Yales married with their cousin branch, the Hughes of Gwerclas, and other noble houses of Britain, such as the Cavendishs, Dukes of Devonshire, and the Norths, Earls of Guilford. Lord North of Wroxton Abbey, the British Prime Minister who lost the American War of Independence under his term, was a cousin. Thomas Yale of Plas-yn-Yale married the daughter of the 14th Baron of Cymmer-yn-Edeirnion, and their daughter Dorothy Yale, married the 16th Baron. In the early 19th century, Sarah Yale, head of the House of Yale, and last of the direct male line, died without children. As an heraldic heiress, the Plas-yn-Yale estate and coat of arms were entailed in her will, making Lt. Col. William Parry-Jones, her cousin, the new heir general of the House, and exchanged by Royal licence 1867, his name and arms for those of Yale, becoming Lt. Col. William Parry Yale.
Cilgerran Castle, seat of Ellis's brother and nephew, granted by their cousin, King Henry TudorGrafton Hall, 1793, a property of the Stanley familyHooton Hall, estate of the Stanley family of Flintshire, Storeton, Eastham, Burton and others
Tudor ap Gruffydd, who married to Margery (Gwenhwyfar) Stanley, daughter of Piers Stanley, Esquire of Ewloe Castle, Flintshire. He was from the family of Sir William Stanley of Hooton, a knight of the Stanley family, brother of Sir John Stanley, King of Mann.
Ellis ap Griffith died in 1489. With his wife Margaret, daughter of Jenkyn of Allt Llwyn Dragon (Plas-yn-Yale), they had seven sons. She was a descendant of the Lord of Gelligynan, holder of the Manor of Gelligynan. They had the following children:
Gruffydd ab Elissau, ancestor of the Lloyds of Carrog and Rhagad
Richard of Meardy in Gwyddelwern. He married Gwen, daughter of leuan ab Dafydd ab leuan ab Gwin of Branas Isaf, one of the Barons of Edeyrnion
Jenkyn ap Ellis
Tudor of Llys Fassi, who married Eleanor, daughter of John Conwy of Bodrhyddan Hall, by whom he had an only daughter and heiress, Gwenhwyfar, who married Edward Lloyd of Gelli Gynan, ancestor of the Lloyds of Llys Fassi
David Lloyd Iâl (Yale), who married to Gwenhwyfar, daughter of Richard Lloyd. He was the heir of Plas-yn-Yale, in the Lordship of Bromfield and Yale, and father of the Yales of Plas-yn-Yale and Plas Grono
David Lloyd Yale had five sons and three daughters, including John Wynn Yale and Chancellor Thomas Yale, uncle of Chancellor David Yale, the grandfather of Capt. Thomas Yale, and great-grandfather of Elihu Yale, benefactor of Yale University in the United States. Thomas Yale built the Yale Chapel during his time serving Elizabeth Tudor as ambassador, a cousin, not far from the ancestral church of Yale named Valle Crucis Abbey.
The branch that emigrated to America was the Yale family of Plas-Grono, family of David Yale, and became prominent in various fields, including commerce, education, theology, politics and military service.
↑Grafton Hall, House, Family & Collections History, DiCamillo Collection, Accessed February 1, 2024
↑Old Pembroke families in the ancient county palatine of Pembroke, Henry Owen, London, 1902, p. 38-39
↑Dwnn's Visitations of Wales, Vol. I, Samuel Rush Meyrick, Llandovery, 1846, p. 91, footnote 1
↑Henry Horwitz, Revolution Politicks. The Career of Daniel Finch, Second Earl of Nottingham, 1647–1730 (Cambridge: Cambridge University Press, 1968), p. 2
12Davies, W. Ll., (1959). VAUGHAN family of Corsygedol, in the parish of Llanddwywe, Meironnydd. Dictionary of Welsh Biography. Retrieved 3 Nov 2023, from https://biography.wales/article/s-VAUG-COR-1250
↑Archaeologia Cambrensis, Cambrian Archeological Association, Thomas Rowland Powe, University of Michigan, 1891, p. 95