Fernando de Sousa da Silva ( 27 November 1712 - 11 April 1786) was the fourth Patriarch of Lisbon, being elected in December 1776, and consecrated on 30 May 1779.

He was elevated to the cardinalate by Pope Pius VI in the secret consistory held on 1 January 1778.

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.

He was named Patriarch of Lisbon by Queen Maria on 14 August 1778.,[1] 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.