Duarte Fernando Álvarez de Toledo
Duarte Fernando Álvarez de Toledo Portugal (c. 1620 – 25 June 1671) was a Spanish nobleman, soldier, and statesman, Grandee of Spain, 7th Count of Oropesa, 6th Count of Deleytosa, 3rd Marquis of Frechilla and Villarramiel, 3rd Marquis of Jarandilla, knight of the Order of Alcántara, who served as Viceroy of Navarre (1643–1645), of Valencia (1645–1650), of Sardinia, President of the Council of the Military Orders (1663–1669) and of the Council of Italy (1669–1671) and Spanish Ambassador to the Holy See.