Élie Metchnikoff
Her maternal grandmother, Emilia (Nevakhovich) Metchnikoff, was the daughter of Lev Nevakhovich (1776–1831), a Russo-Jewish author, translator, and founder of the Haskalah movement in Russia. Emilia married a Guards officer, Ilya Metchnikoff, and had two sons; the Nobel Prize-winning microbiologist Élie Metchnikoff and the sociologist Lev Metchnikoff.