Viscounts of Oña Vizcondes de Oña Created by Isabella II, queen of Spain First holder Tomás Eustaquio de Corral y Oña, 1st marquess of San Gregorio * 1807 Records #3 Holders Family filter On/Off 1 Tomás Eustaquio de Corral y Oña, 1st marquess of San Gregorio * 1807 2 Fernando Luis de Corral y Usera, 2nd marquess of San Gregorio * 1846 3 Pedro Pablo de Corral y Tomé, 3° viscount of Oña Corrections and Updates To suggest a correction or an update. Click Here