Sascha Schapiro
Alexander "Sascha" Schapiro (Russian: Александр Шапиро; c. 1890 – 1942), also known by the noms de guerre Alexander Tanarov, Sascha Piotr, and Sergei, was a Ukrainian anarchist revolutionary and father of eminent 20th century mathematician Alexandre Grothendieck.
Read more about Sascha Schapiro: Early Years and Russian Revolutions, Life in Europe, Family and Death, See Also