Baron Grandison was by modern doctrine a title in the Peerage of England created for two brothers, Sir Otton de Grandson and Sir William Grandison, who were summoned to Parliament in 1299. Any hereditary barony for Sir Otho lapsed on his death in 1328, as did that for Sir William on the death of his grandson Thomas Grandison in 1375.[1]
The family originated in what is now the Swiss canton of Vaud by the name of Grandson, the anglicised Grandison was a shortening of the Latin form Grandisono. The family origins lay in the grant of land by Lake Neuchâtel during the last years of the Second Kingdom of Burgundy.
Simplified descent
Pierre de Grandson (c1186-died 1258) marries Agnès de Neuchâtel, their children include
Otto de Grandson (c1238-died 1328). Sheriff of Tipperary, Lord of the Channel Islands, Lieutenant of Gascony and Justiciar of North Wales
Gérard de Grandson (1239-died 1278), Bishop of Verdun
The British royal family descends from William through two of his daughters. From Catherine de Grandson through the Montacute and Mortimer families and Richard, Earl of Cambridge, grandfather of Edward IV. From Mabel de Grandson through the Beauchamp and Beaufort families to Henry VII, founder of the Tudor dynasty.[3]
^Audrey Erskine, Grandison, John (1292–1369), Oxford Dictionary of National Biography, Oxford University Press, 2004; online edition (subscription required). Retrieved 2020-02-29.
^ Michael Ray, "The Savoyard Cousins: A Comparison of the Careers and Relative Success of the Grandson (Grandison) and Champvent (Chavent) Families in England", The Antiquaries Journal, 2006 86 p. 166 The present royal family descends from the grandsons, whose descendants have produced both the Yorkist and Tudor kings of England.
Maddicott J. R. "Grandson , Sir Otto de (c.1238–1328)", Oxford Dictionary of National Biography. Oxford University Press, 2004 [online 2005]. Accessed 31 May 2015.
Marshall, John (2025). Othon de Grandson: Edward I’s Loyal Knight of Renown. Barnsley: Pen and Sword Books. ISBN 9781399039628
Marshall, John (2022). Welsh Castle Builders. Barnsley: Pen and Sword Books. ISBN978-1-39908-549-6.
Ray, Michael. 2006. The Savoyard Cousins: A Comparison of the Careers and Relative Success of the Grandson (Grandison) and Champvent (Chavent) Families in England. The Antiquaries Journal 86