Marquesses of O'Reilly Marqueses de O'Reilly Created by Alphonse XIII, King of Spain First holder María de las Mercedes O' Reilly y Ruiz de Apodaca, 1ª marquise of O' Reilly * 1847 Records #4 Holders Family filter On/Off 1 María de las Mercedes O' Reilly y Ruiz de Apodaca, 1ª marquise of O' Reilly * 1847 2 Darío Valcárcel y Kholy, 2nd marquess of O' Reilly * 1906 3 Darío Valcárcel y Lezcano, 3rd marquess of O' Reilly * 1940 4 Marina Valcárcel y Silvela, 4ª marquise of O' Reilly * 1969 Corrections and Updates To suggest a correction or an update. Click Here