Answer
Polish was Tsiolkovsky's father's nationality. Tsiolkovsky's father, Makary Yegorovich Tsiolkovsky, was born in Poland in 1805. He was a forester and a teacher. He married Maria Ivanovna Yumasheva, a Russian woman, in 1833. The couple had five children, including Konstantin Eduardovich Tsiolkovsky, who was born in 1857.