In 1835, he married, morganatically, Claudine Rhédey von Kis-Rhéde (1812-1841), born in Sângeorgiu de Pădure, Romania, by whom he fathered three children: Claudine, Francis and Amalie.
Camilla Faà di Bruno, (c.1599–1662), a society beauty who was married secretly, briefly and morganatically to Ferdinando I the Gonzaga Duke of Mantua and Monferrato; her memoirs have been described as the first prose autobiography written by an Italian woman.
He married secondly, also morganatically, in Bern on 11 July 1997 to Gertrud Krieg (born Olten, Solothurn, 18 March 1958), without issue.
Pasquale married morganatically to Blanche Marconnay, daughter of Henriette de Marconnay, on 20 November 1878 in Clichy, Hauts-de-Seine.