The Ungern-Sternberg family or von Ungern-Sternberg is an old and influential Baltic-German nobility, with branches belonging to the German, Finnish, Swedish and Russian nobility. Notable members. Mattias Alexander von Ungern-Sternberg (1689–1763), lantmarskalk at the Swedish Riksdag of the Estates (1742, 1746) Anna Dorothea von Ungern-Sternberg (1769–1846), wife of Aleksey Grigorievich Bobrinsky. Alexander von Ungern-Sternberg (1806–1869), Baltic German novelist, poet and painter. Roman von Ungern-Sternberg (1886–1921), Russian general, White Movement warlord.
https://en.wikipedia.org/wiki/Ungern-Sternberg