3rd Earl of Buchan John Comyn
1260 - 1308 (48 years)(
= Descendancy chart to this point, 
= Expand, 
= Collapse)
- 1 3rd Earl of Buchan John Comyn [1] b. 1260 d. 1308
- + Isabel MacDuff of Fife b. 1332 d. 12 Aug 1389
- + Isabel MacDuff of Fife b. 1332 d. 12 Aug 1389