Sir Gilbert de la Hay, of Locherworth

Sir Gilbert de Haya of Locherworth swore fealty to King Edward I. 12 July 1296. He had charters from King Robert I. (1306-29), to Gilbert de Haya of Locherwart of the lands of Aucliinficlilach, etc., which belonged to Sir Duncan Frendrauglit, of the lands of Achenus, etc., of the Forest of Dwue and of the lands of Awne in Boyne, with many others in the county of Banff, together with a grant of the office of Forester of the forests of Awne and Boyne. A charter was granted in the reign of the same monarch to Gilbert Hay of the lands of Brechin, co. Forfar, by William de Montealto, of Kinblathmonth.
He married Mary, daughter and coheir of Sir Simon Eraser of Oliver Castle, who was executed by Edward I. 1306. With her he acquired Oliver Castle and a considerable estate in co. Peebles, and his descendants have since quartered the Fraser arms. He had issue:
1. Thomas, his heir.

Source: "The Scots Peerage" Vol 8, page 418.