The parents listed for this individual are speculative and may not be based on sound genealogical research. Sources to prove or disprove this ancestry are needed. Please contact the Profile Manager or leave information on the bulletin board.
Hugh is said to be the son of Brian MacPhelim O'Neill and Eleanor Magennis O'Neill, and is the lost heir of Shane's Castle in Antrim, Ireland.  He is also said to be the son of “French John” O’Neill and Charity Dixon. The truth is unknown.
Hugh is thought to have arrived in Delaware in approximately 1730-1735  when he is said to have abandoned duties while a Captain Major in the Royal Navy , jumping ship while docked in the Delaware Bay. In doing so, he forfeited rights to the O'Neill fortune in Ireland. He was a descendant of Conn mac Cuinn O'Neill, last King of Tir Eógain (Tyrone). 
Other information from O'Neills can be found here 
U.S. and International Marriage Records, 1560-1900
It may be possible to confirm family relationships with Hugh by comparing test results with other carriers of his Y-chromosome or his mother's mitochondrial DNA.
Y-chromosome DNA test-takers in his direct paternal line on WikiTree: