Wassily Hoeffding

https://en.wikipedia.org/wiki/Wassily_Hoeffding

https://mathshistory.st-andrews.ac.uk/Biographies/Hoeffding/

Wassily Hoeffding was a Finnish statistician and probability theorist.

Wassily Hoeffding's parents lived in Tsarskoye Selo (meaning the Tsar's Village, and now named Pushkin) which is 22 kilometres south of St Petersburg. However, they spent the summer in Mustamäki, at that time part of the Russian Empire, and it was there that Wassily was born. He gives some details of his family in [2]:-
My father, whose parents were Danish, was an economist and a disciple of Peter Struve, the Russian social scientist and public figure. An uncle of my father's was Harald Hoeffding, the philosopher. My mother, née Wedensky, had studied medicine. Both grandfathers had been engineers.

Wassily was one of his parents' three sons, having an older brother Waldemar and a younger brother Oleg. He spent the first six years of his life in Tsarskoye Selo - well that is not quite accurate since the city was renamed Detskoe Selo (meaning the Children's Village) in 1918. He did not begin schooling in Russia, but after the family moved to Denmark in 1920 he entered elementary school. They only spent four years in Denmark before they moved again, this time settling in Berlin.