Dukes of San Lorenzo Duques de San Lorenzo First holder Richard de Dampierre, 1str duke of San Lorenzo * 1857 Records #3 Holders Family filter On/Off 1 Richard de Dampierre, 1str duke of San Lorenzo * 1857 2 Roger de Dampierre, 2e duke of San Lorenzo * 1892 3 Richard Roger Emmanuel Etienne Pierre de Dampierre, 3rd duke of San Lorenzo * 1916 Corrections and Updates To suggest a correction or an update. Click Here