Carlos O'Neill (9 June 1760 – 24 June 1835), was the titular head of a branch of the Clanaboy O'Neill dynasty, whose family has been based in Portugal since the 18th century.
O'Neill was a trader, a Professed Knight of the Knight of the Order of Christ, Lord of many Majorats and of the Farms Quinta dos Bonecos and Quinta da Saboaria, at the term of Setúbal, etc.
He inherited from his father-in-law the Casa Comercial Torlades, of which he became the Main Manager, and the Farm Quinta das Machadas, in the Parish of São Julião, term of Setúbal, of which he became Lord by purchase from the Botelho de Moraes Sarmento family, Lords of the Major Guard of the Salt of Setubal and Counts of Armamar, who owned Quinta das Machadas since circa 1610.
On 25 May 1825 the Farm was visited by King John VI of Portugal, accompanied by the Infanta Isabel Maria of Portugal and the Infanta Maria da Assunção of Portugal, and by the Court, being received and hosted by its Proprietor, the mentioned Carlos O'Neill, for whom the mentioned farm had passed on to, by marriage, by which the Crest of the O'Neill Family was placed over the door of the western front, etc.
[1] He married in Lisbon, Sacramento, on 17 September 1784 to Ana João Torlade, daughter of Jacob Frederico Torlade and wife Maria Inácia Gonçalves, and had issue, nine children:[2]