Background
He was the first son of the previous head Hugo José Jorge O'Neill and wife Dona Júlia Margarida Catarina de Serpa Pimentel de Sousa Coutinho.
He was the first son of the previous head Hugo José Jorge O'Neill and wife Dona Júlia Margarida Catarina de Serpa Pimentel de Sousa Coutinho.
He was officially recognized by the heraldic societies throughout Europe as titular Prince and Count of Clanaboy, but has refused to use the title, preferring instead the style O'Neill of Clannaboy. He was also Viscount of Santa Mónica, in Portugal. Jorge O'Neill was an Electronic Engineer graduating from the University of Lausanne, Switzerland.
He was recognized by the Chief Herald of Ireland as Chief of the Name for the O'Neill of Clannaboy.