This is a history of several generations of two related families of Counts, Vorontsov and Vorontsov-Dashkov from the beginning of the 18th to early 20th centuries. The study starts with an etymology of the family name, and a history of their coats of arms and titles. Several of the best known members of this family are featured in the book: Voevode of Rostov Velikii Larion Vorontsov (1674-1750), Chancellor of Elizavetta Petrovna Mikhail Vorontsov (1714-1767, the first governor of Vladimir Roman Vorontsov (1717-1783); the first minister of foreign affairs Aleksandr Vorontsov (1741-1805); Russian ambassador to England Semen Vorontsov (1744-1832); the first president of the Academy of Sciences Ekaterina Vorontsova-Dashkova (1743-1810); settler of the south of Russia Mikhail Vorontsov (1782-1856), and others. Genealogical tree, name index, bibliography.