Turlough O’Neill, Lord of the Fews1 
He was transplanted by Cromwell to County Mayo.1 He gained the rank of Colonel in the Royalist Army.1 He fought in the English Civil War.1
Children of Turlough O’Neill, Lord of the Fews and Mary O’More
Roger O’More1
Child of Roger O’More
Mary O’More1
Her married name became O’Neill.
Children of Mary O’More and Turlough O’Neill, Lord of the Fews
Honora Macdonell1
Her married name became O’Neill.
Children of Honora Macdonell and Conn O’Neill
Conn O’Neill1
He was He was transplanted to Newcastle, County Mayo.1 He lived at Cross, County Antrim, Ireland.1
Children of Conn O’Neill and Honora Macdonell
Henry O’Neill1
He lived at Foxford, County Mayo, Ireland.1 He gained the rank of Captain in 1689 in the King James II’s Irish army.1
Child of Henry O’Neill
Niall O’Neill1
He lived at Cloon, County Leitrim, Ireland.1 He was living in 1717.1
Child of Niall O’Neill
Eliza O’Kelly1
- [S37] BP2003 volume 2, page 2995. See link for full details for this source. Hereinafter cited as. [S37]
Niall O’Neill1 
He gained the rank of Lieutenant-Colonel in the Spanish service in Portugal.1 He was he won his Lieutenanncy under Captain Don Joseph O’Donnell (ancestor of the Dukes of Tetuan) as a prize for Ensigns who had distinguished themselves in mathematics in 1759.1
Arturo O’Neill, 1st Marqués del Norte1 
He was a soldier in Spanish service in South America and West Indies.1 He held the office of Governor of Pensacola, Florida in 1781.1 He was Captain-General of Yucatan and Governor of Merida in 1792.1 He held the office of Member of the Spanish Supreme Council of War in 1803.1 He was created 1st Marqués del Norte [Spain] in 1805.1 He fought in the Peninsular Wars.1