Esq Dafydd Gam
- Born: 1365
- Marriage: Gwenllian Howell
- Died: 1415, Battle Of Agincourt, at age 50
From Howel the Good the line is traced to Einon Sais (who had lived in England and inherited the estate of Castle Einon Sais), his son Howel and his son, Llewellyn-ap-Hoel, the father of Roger, Griffith, Richard, William, Helen and David-ap-Llewellyn, later known as David Gam, a conspicuous and potential personage in Wales in the early part of the fifteenth century, a man of courage and judgment; of dauntless spirit and soldierly tact. By his personal daring on the Field of Agincourt (1415) he saved the life of Henry V., but was himself mortally wounded. He was knighted by his King just before he died. He entered the King's military service as David-ap-Lllewellyn, but having a squint eye, the word signifying it, "Gam," was applied to him and he was knighted Sir David Gam and herein we find the origin of the name Gaines. The name remained Gam through two generations. His great grandson added "es" and thereafter it was Games; which form was adhered to in Wales, but in England it became Ganes, Gaynes and finally Gaines. Thomas Jones, an eminent genealogist, in 1599, makes this important statement: "From this Sir David Gam all ye Games of Brecknogshire, all ye Vaughns, and all ye Herberts of South Wales are descended and ye most part of all the nobility of England."
William Herbert and the Earl of Pembroke were great grandsons of Gladis, daughter of Sir David Gam. They were the friends and patrons of Shakespeare, and it was at Wilton, the home of the Earl of Pembroke, that King James, on December, second, 1603, first witnessed a performance of one of Shakespeare's plays. The Herberts took an active part in the early settlement of America, and were members of the Virginia Company organized by Sir Walter Raleigh, Morgan, the eldest son of Sir David Gaines (Gam) was great-great-grandfather of Sir John Gaines (1559-1606) of Newton, County of Brecon, Wales
Esq married Gwenllian Howell. (Gwenllian Howell was born in 1370.)