 Marquess of San Isidro

Marquess of San Isidro () was a hereditary title in the Peerage of Spain.On 14 January 1730, the title "Viscount of Benafarces" inherited by Pablo Rui-Gómez Lasso de la Vega y Balmaseda in 1729, was elevated to the title "Marquess of San Isidro" by the king Philip V, in recognition of his contribution to the restoration of the Basilica of San Isidoro in Leon, Spain.