Brother of David Hay, lord of Errol (d.1237×41) (Familial relationship)
- Robert Hay, clerk (son of William)
- From Source
3/276/13 (Lind. Cart., no. 66)
- Firm date
- circa 1230 X 18 April 1241
- Dating Notes
- Attestations of Simon de Camera and Henry son of Geoffrey (burgesses of Perth) × death of Sir David de Haya, lord of Erroll.