Dukes of Blacas Ducs de Blacas Records #4 Holders Family filter On/Off 6 Pierre de Blacas d' Aulps, 6th duke and 6th prince of Blacas * 1913 Louis de Blacas d' Aulps, 2e prince et duke of Blacas * 1815 Pierre de Blacas d' Aulps, 4e duke of Blacas * 1853 Stanislas de Blacas d' Aulps, 5e duke of Blacas * 1885 Corrections and Updates To suggest a correction or an update. Click Here