Alexander de Dunbar

From The Scots Peerage, Vol. III, p. 248: <Archive.Org>

“Edgar, styled son of Gospatric in a charter granted by him to the monks of St. Albans, sometime between 1139 and 1146. … The date of his death has not been ascertained. He married Aliz, daughter of Ivo, son of Forne, and with her obtained ten manors, five of which were in Northumberland, in Ooquetdale, and the others situated in Yorkshire, Westmoreland, and Cumberland.”

Children of Edgar of Dunbar and Alice de Greystoke:

1. Agnes of Dunbar. Married Anselm le Fleming. [Not in TSP]
2. Alexander, who died without issue.
3. Patrick, who succeeded his father Edgar in the lands of Caistron. He or his descendants took the name of Caistron or Kestern, the last owner of the lands, John of Kestern, parting with them to the Abbey of Newminster about 1247, or a little lafer.3