Fernando Ramírez de Haro, 10th Marquis of Villanueva del Duero

Don Fernando Ramírez de Haro y Aguirre, 10th Marquis of Villanueva de Duero (born 23 August 1976) is a Spanish aristocrat.

Born at Madrid, he is the eldest son of Fernando Ramírez de Haro, 16th Count of Bornos, Grandee of Spain, and his wife Esperanza Aguirre y Gil de Biedma, the prominent conservative politician and former President of the Community of Madrid.

On 12 April 2000, his paternal grandfather, Ignacio Ramírez de Haro, 15th Count of Bornos, ceded him the marquessate of Villanueva de Duero