| Father | Sir Donald Balloch McDonnell |
| Mother | Joanna O'Neill |
| Son | Niall Mor Prince Of Clanaboy O'Neil+ (b. 1465, d. 11 April 1512) |
| Pedigree Chart |
| Name | Mary McDonnell was also known as Mary O'Neil. | |
| Marriage | Conn First Lord Of Tyrone ("The Lame") O'Neil and she were married. | |
| Birth | 1450 | She was born in 1450 in IrelandBGO. |
| Death | 1488 | She died in 1488 at age ~38. |
| Last Edited | 2 December 2016 |