His daughter Elisabeth (1746-1818) captivated Giacomo Casanova but married her cousin Jacob Sievers who administered the north-west of modern-day Russia and built the Sievers Canal connecting the Msta and Volkhov rivers.
Faddey Vasilievich Sievers (Фаддей Васильевич Сиверс, 1853–1915) was a member of the Sievers family who served as a general in the Russian army during World War I at the Second Battle of the Masurian Lakes.
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