He was born in
Lisbon, the son of Aleixo de Sousa da Silva e Menezes, 2nd Count of Santiago de Beduído, and his wife D. Leonor Maria de Menezes, and brother of the 3rd and 4th Counts. He was a direct descendant of
Vasco da Gama,
Francisco de Portugal, 3rd Count of Vimioso,
D. Afonso, Count of Ourém, and therefore also the first
Duke of Braganza,
D. Afonso. His studies took place at the
University of Coimbra, where he graduated with a degree in Canon law. Further receiving the insignia of clerical character on 13 April 1721, the Minor Orders on 17 September 1734 and the diaconia on 20 December 1738. Thereafter appointed chaplain-vicar of Lisbon on 1 November 1776. He situated his residence in the
Palace of Junqueira, in Lisbon. He was created cardinal in the consistory of 1 June 1778, the Pope sending the cardinal's cap with Mons. Francesco Serlupi, as he never ventured to
Rome to receive his cap and respective title. He was named Patriarch of Lisbon by
Queen Maria on 14 August 1778., and on 1 March 1779, he received his
pallium. In a pastoral letter on 2 April, he confessed his reluctance to accept the appointment and the uneasiness that plagued him in his perception that it would be useless to refuse. His appointment was consecrated on 30 May 1779, in the chapel of the Palace of Junqueira. His solemn entry into the city was made the following June. He died on 11 April 1786, at 7 o'clock, of
apoplexy in Lisbon and was buried alongside his predecessor, Cardinal
Francisco de Saldanha da Gama, in the
Jerónimos Monastery in Lisbon. ==References==