Brian (2nd Baron Dungannon) O'Neill
- Yes, date unknown
Generation: 1
Generation: 3
Generation: 4
1. Brian (2nd Baron Dungannon) O'Neill (daughter of Ferdoragh\Mathew (1st Baron) O'Neill); and died.
2. Ferdoragh\Mathew (1st Baron) O'Neill (son of Con Bacach (1st Earl of Tyrone) O'Neill and Mary Macdonnell); died on 22 Jun 1600. Children:
- 1. Brian (2nd Baron Dungannon) O'Neill and died.
- Aedh\Hugh (King of Ulster) O'Neill died on 20 Jul 1616 in Rome.
Generation: 3
4. Con Bacach (1st Earl of Tyrone) O'Neill was born about 1484 (son of Con Mor (King of Ulster) O'Neill and Eleanor (of Kildare) Fitzgerald); died before 16 Jul 1559. Con + Mary Macdonnell. Mary (daughter of Alexander (Sir) Mac Ranald Buie Macdonnell) and died. [Group Sheet] [Family Chart]
5. Mary Macdonnell (daughter of Alexander (Sir) Mac Ranald Buie Macdonnell); and died. Children:
- 2. Ferdoragh\Mathew (1st Baron) O'Neill died on 22 Jun 1600.
Generation: 4
8. Con Mor (King of Ulster) O'Neill (son of Henry (King of Ulster) O'Neill and Gormfhlaith Kavanagh); died on 8 Jan 1492-1493. Con married Eleanor (of Kildare) Fitzgerald before 1480. Eleanor (daughter of Thomas (7Th Earl of Kildare) Fitzgerald and Joan Cam (of Desmond) Fitzgerald) and died. [Group Sheet] [Family Chart]
9. Eleanor (of Kildare) Fitzgerald (daughter of Thomas (7Th Earl of Kildare) Fitzgerald and Joan Cam (of Desmond) Fitzgerald); and died. Children:
- 4. Con Bacach (1st Earl of Tyrone) O'Neill was born about 1484; died before 16 Jul 1559.
- Sean\Shane O'Neill and died.
10. Alexander (Sir) Mac Ranald Buie Macdonnell and died. Children:
- 5. Mary Macdonnell and died.