Son of John Abb, son of Malise of Brechin (Familial relationship)
- Morgan Macnab, son of John Abb of Brechin
- From Source
3/101/1 (Arb. Lib., no. 72)
- Firm date
- 24 August 1198 X 5 July 1210
- Dating Notes
- Birth of Alexander II × royal confirmation (<em>RRS</em> ii, no. 487).