Marquess of Guadalcanal () is a hereditary title of Spanish nobility.Spanish official website It was created on 11 July 2008 by King Juan Carlos I of Spain in favor of Antonio Fontán Pérez, journalist and politician.
List of Holders Antonio Fontán Pérez, 1st Marquess of Guadalcanal (2008–2010) Eugenio Fontán Pérez, 2nd Marquess of Guadalcanal (2012–2017) María Teresa Fontán Oñate, 3rd Marchioness of Guadalcanal (2018– )
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