Question: What Russian female had siblings Alexander Vorontsov, Elizaveta Vorontsova, and Semyon Vorontsov?
Sentence (from "Yekaterina Vorontsova-Dashkova"): Princess Yekaterina Romanovna Vorontsova-Dashkova (Russian: Екатери́на Рома́новна Воронцо́ва-Да́шкова ; 28 March [17 March o.s.] 1743 – 15 January [4 January o.s.] 1810) was the closest female friend of Empress Catherine the Great and a major figure of the Russian Enlightenment.
Relevant evidence: Yes