João O'Neill (inIrishSéan Ó Néill, inEnglishShane orJohn O'Neill; died 21 January 1788), was the titular head of a branch of the Clanaboy O'Neill dynasty, whose family has been inPortugal since the 18th century.
He was born in the village of Richhill,County Armagh, the first-born son of the previous headConn Ó Néill and wife CeciliaO'Hanlon.
In 1740, for religious and political motives, he moved toPortugal with his brothers, where he was an importantproprietor in the Council ofAlmada. He also acquired thehouse andfarm of Arealva.[1][2]
He married in Lisbon, São Paulo, on 2 September 1750 to Valentina Maria Josefa Ferreira (Torres Vedras,Carmões, 14 February 1730 - ?), daughter of José Ferreira (Lisbon, São Miguel deAlfama - ?), and wife Maria Ferreira (Torres Vedras, Carmões - ?), and had three children:
He died inSantos-o-Velho,Lisbon, on 21 January 1788.
