On 4 March 1935, in Rome, Jaime married Victoire Jeanne Emmanuelle (Emanuela) Joséphine Pierre Marie de Dampierre (8 November 1913 in Rome – 3 May 2012 in Rome), daughter of Roger de Dampierre, 2nd Duke of San Lorenzo Nuovo, Vicomte de Dampierre (1892–1975) and of Donna Vittoria Ruspoli (1892–1982), daughter of Emanuele Ruspoli, 1st Principe di Poggio Suasa, and his third wife, English American Josephine Mary Curtis.