Leontiy Ivanovich Sivtsov ( Russian: Леонтий Иванович Сивцов; 1872–1919) was a church reader who lived in Unalaska. Along with Aleksey Yachmenev, who like Sivtsov was Aleut himself, Sivtsov accompanied Waldemar Jochelson on his 1909–1910 ethnological studies on the Aleut.
Leontiy Ivanovich Sivtsov ( Russian: Леонтий Иванович Сивцов; 1872–1919) was a church reader who lived in Unalaska. Along with Aleksey Yachmenev, who like Sivtsov was Aleut himself, Sivtsov accompanied Waldemar Jochelson on his 1909–1910 ethnological studies on the Aleut.