Ellis ap Griffith

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.