Princess Yevdokiya Borisovna Yusupova May 5 (NS: May 16) 1743, Moscow - July 19 (NS: July 8) 1780, Saint Petersburg), married on March 6, 1774, Mitava (Mittau) (divorced in 1777 or 1778), as his second wife, to Peter von Biron, the last Duke von Kurland (1769–1795) and the first Duke von Sagan (1786–1795) (February 15, 1724, Mitava (Mittau) - January 13, 1800, Schloss Gellenau), without offspring