Tracing Douglas family roots - unraveling history, one generation at a time.
- 919
| Flaithbertach Macmuirchertaig O'néill | |
| D: | 949 |
| Muirchertach Macdomnaill (King of Mide) O'néill | |
| D: | 977 |
| Killed In Battle Against Norse King Of Dublin | |
| Muiredach Midheach Macdomnaill O'néill | |
| D: | 877 |
| Aed Macdomnaill O'néill King of Ailech -Yes, date unknown |
| Aed Macdomnaill O'néill King of Ailech | |
| D: | Yes, date unknown |
| Domnall Macmuirchertaig O'néill King of Ireland | |
| D: | 980 |
| Donnfhlaith (of Northumberland & Dublin) O'néil | |
| D: | 981 |
| Muirchertach Macnéill Glúndub (of Ailech) O'néil | |
| D: | 26 Feb 942-943 |
| In Battle At Ardee | |
| Conaing Macnéill Glúndub O'néil -Yes, date unknown |
| Conaing Macnéill Glúndub O'néil | |
| D: | Yes, date unknown |
|
| Niall Glúndub Macaedo Findliath O'néill | |
| D: | 15 Sep 919 |
| Battle Against Norse King Of Dublin | |
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