Heber MacMahon
| Heber MacMahon | |
|---|---|
| Bishop of Clogher | |
| Church | Roman Catholic Church | 
| See | Clogher | 
| In office | 1643–1650 | 
| Predecessor | Eugene Matthews | 
| Successor | Patrick Duffy | 
| Previous post(s) | Bishop of Down and Connor | 
| Personal details | |
| Born | 1600 Inniskeen | 
| Died | July or September 1650 | 
Heber MacMahon (Irish Éimhear Mac Mathúna) (1600 – 1650) was bishop of Clogher and general in Ulster. He was educated at the Irish college, Douay, and at Louvain, and ordained a Roman Catholic priest 1625. He became bishop of Clogher in 1643 and a leader among the confederate Catholics. As a general of the Ulster army, he fought Oliver Cromwell at the Battle of Scarrifholis in 1650. He was defeated, taken prisoner and executed the same year.