In Cascais, Estoril, at the Igreja de Santo António, on 16 December 1941 he married Dona Maria Cristina da Silva José de Mello (Lapa, Lisbon, 6 March 1920 – Lisbon, Prazeres, 25 August 2006), daughter of the major industrialist Dom Manuel Augusto José de Mello (of the Counts do Cartaxo, Counts and Marquesses of Sabugosa, Counts of São Lourenço and Alferes-Majors of the Realm), and Amélia de Resende Dias de Oliveira da Silva. They had seven children together. Maria Cristina was an heir to the Grupo CUF, a company that was a conglomerate with interests in chemical, textiles, banking, insurances, shipbuilding and repairing, shipping and tobacco industries. They were divorced by 1957, after which he started competing with his ex-brother-in-law in the banking and insurance markets. His ex-wife married secondly in Lisbon, São Mamede, on 29 March 1980 Amaro de Azevedo Gomes (Cascais, São Domingos de Rana, 22 June 1917 – Lisbon, São Mamede, 1 January 2008), without issue.