Meyendorff, a Russian family, originating in Saxony, and including among its members Pope Clement II. They settled in Livonia about 1200, and became Swedish barons in the 17th century. Subsequently they acquired distinction in the Russian military and diplomatic service, especially Peter (1796-1863), who was ambassador in Vienna in 1850, and one of the negotiators of the convention of Olmutz: Alexander (died in 1865), a geographer and geologist, who promoted and accompanied in 1840 Murehison's and Vernenil's exploration of northern Russia; Georg (died in 1803), who published Voyage d'Orembourg a Boukhara (Paris, 1826); and Felix (died in Carlsruhe, Jan. 16, 1871), who in 1857 married the prin-cess Olga, a daughter of the late prince Michael Gortchakoff, became secretary of legation in Berlin, and in 1864 charge d'affaires in Rome, his stormy interview with the pope, Jan. 1, 1866, resulting in a temporary rupture between the cabinet of St. Petersburg and the holy see. Subsequently he was charge d'affaires at Carlsruhe.