Only child and son of Vasco Rui da Cruz Sinel de Cordes, patrilineally Pelles, of some Dutch, Germano, Italian and Spanish descent, descendant of the former Lords of the Majorat of the Farm of Nossa Senhora da Conceição or Sinel de Cordes Farm, in Ribeira Abaixo, Barcarena, Oeiras, and descendant of one of the many bastard children, a daughter, of Don Gaspar Pérez de Guzmán y Gómez de Sandoval, ninth Duke of Medina Sidonia Grandee of Spain First Class Nobleman of Coat of Arms of de Guzmán (timber) with crown of Duke and with mantel of crown of Duke, seventh Marquess of Cazaza Nobleman of Coat of Arms of de Guzmán (timber) with crown of Marquess, thirteenth Count of Niebla Nobleman of Coat of Arms of de Guzmán (timber) with crown of Count, fourteenth and last Lord of Sanlúcar de Barrameda Nobleman of Coat of Arms of de Guzmán (timber) with crown of Lord, brother of Doña Luisa María Francisca de Guzmán y Sandoval, Queen and later Regent of Portugal, and first civil wife Maria de Fátima Pereira. His father married secondly civilly with Liliane Correia and had an only child and son, Vasco António Correia Sinel de Cordes, married civilly and father of an only child and daughter.