Leoncio Alonso González de Gregorio, 22nd Duke of Medina Sidonia

Don Leoncio Alonso González de Gregorio y Álvarez de Toledo, 22nd Duke of Medina Sidonia, Grandee of Spain (born 3 January 1956) is a Spanish aristocrat and historian. Born in Madrid, Medina Sidonia is the eldest son of Leoncio González de Gregorio y Martí and his wife Luisa Isabel Álvarez de Toledo, 21st Duchess of Medina Sidonia. The Duke is Professor of History at the University of Castile-La Mancha and of the Diplomatic School of the Ministry of Foreign Affairs and Cooperation.

Medina Sidonia married firstly his distant cousin María Montserrat Viñamata y Martorell, younger daughter of Luis Viñamata y Emmanueli and María de la Concepción Martorell, 23rd Countess of Alba de Liste, on 12 December 1983, and divorced in 1998. They had two children:

• Don Alonso Enrique González de Gregorio y Viñamata (b. 31 December 1983)
• Doña María de la Soledad González de Gregorio y Viñamata (b. 6 September 1989)

The Duke married secondly Pamela García Damián, of Venezuelan origin, daughter of Armando García Liceaga y Pérez de Viñaspre and María Pilar Damián Gracia, in 2001.

Titles

• 22nd Duke of Medina Sidonia, Grandee of Spain
• 18th Marquis of Villafranca del Bierzo, Grandee of Spain
• 17th Marquis of los Vélez, Grandee of Spain
• 26th Count of Niebla

Styles

• The Most Excellent The Count of Niebla (1956–2008)
• The Most Excellent The Duke of Medina Sidonia (2008-)

• Boletín Oficial del Estado: no. 183, p. 32845, 30 July 2008. (Spanish)
• Boletín Oficial del Estado: no. 132, p. 47106, 31 May 2010. (Spanish)
• Boletín Oficial del Estado: no. 132, p. 47104, 31 May 2010. (Spanish)
• Although the Countship of Niebla The Duke held at the time didn't have Gradeeship of Spain, heirs apparents of Grandees are styled in the same way as their parents, The Most Excellent, while younger children are styled The Most Illustrious. Francisco López-Nieto y Mallo, Honores y Protocolo, 2 Volumes, Consultor, 2006. ISBN 84-7052-290-6 and ISBN 978-84-7052-290-1