Jaime Álvares Pereira de Melo, 10.º Duque de Cadaval, was born 21 January 1913 in San Sebastian, Basque Country, Spain to Nuno Álvares Pereira de Melo (1888-1935) and Diane de Gramont de Coigny (1889-1955) and died 30 July 2001 Estoril, Cascais, Portugal of unspecified causes. He married Antoinette Schweisguth (1899-1982) 29 May 1936 . He married Claudine Tritz (1943-) 1975 .
Children
| Name | Birth | Death | Joined with |
| Rosalinda Álvares Pereira de Melo (1936-) | 2 July 1936 Edmonton, Middlesex, England, United Kingdom | Hubert Guerrand-Hermès (1940-2016) | |
| Maria Graziela Álvares Pereira de Melo (1938-) | 8 April 1938 Lausanne, Vaud, Switzerland | Maria-João Gameiro Lagoa (1929-) | |
| Name | Birth | Death | Joined with |
| Jaime Álvares Pereira de Melo (1946-) | 4 November 1946 | Isabelle Ehrlich (1963-) | |
| Name | Birth | Death | Joined with |
| Diana Álvares Pereira de Melo (1978-) | 25 July 1978 Geneva, Canton of Geneva, Switzerland | Charles Philippe d'Orléans (1973-) | |
| Alexandra Álvares Pereira de Melo (1982-) | 27 January 1982 New York, New York, United States | ||
Siblings
| Name | Birth | Death | Joined with |
| Jaime Álvares Pereira de Melo (1913-2003) | 21 January 1913 San Sebastian, Basque Country, Spain | 30 July 2001 Estoril, Cascais, Portugal | Antoinette Schweisguth (1899-1982) Rosemary Wright (1917-1996) Claudine Tritz (1943-) |