William de Grandison 1st Lord Grandison

✓ Sir William de Grandison of Ashperton, co. Hereford, younger brother of Otes de Grandison; a Burgundian ('patrem licet Burgundum genere') in the service of Edmund, Earl of Lancaster; fortified Caernarfon castle 1288-89; licence to crenellate Ashperton 1292; governor of Jersey and Guernsey 1294; at the siege of Carlaverock 1300; sum. to Parl. from 6 Feb 1298/9 as Lord Grandison; d. 27 June 1335, presumably bur. at Dore Abbey: CP VI 'Grandison' pp.60-62. m. Sibyl, da. and coh. of Sir John Tregoz, with whom he shared the Tregoz inheritance in 1300-02. Father of Piers, 2nd Lord, of Bishop John Grandison of Exeter, and of Katherine, Countess of Salisbury. TOP above him: the Grandson family of the Vaud (Les Dynastes de Grandson) note-only. Source: Complete Peerage 2nd ed. vol. VI (1926), 'Grandison' pp.60-68 and notes (archive.org completepeerageo06coka_0), read 27 Oct 2026. [DIRECT ANCESTOR OF THE COMPILER: flag added 27 Oct 2026 by walking the tree from Aynsley, so that this marker is reliable and can be searched.]