And if you look at the people behind those names, you'll find that most of them were either born in the Russian Empire or moved there at a young age.

https://en.wikipedia.org/wiki/Michael_Andreas_Barclay_de_Tol... - moved to St Petersburg around the age of 3

https://en.wikipedia.org/wiki/Pyotr_Bagration - born in Russia

https://en.wikipedia.org/wiki/Peter_Wittgenstein - born near Kyiv

https://en.wikipedia.org/wiki/Alexander_Ivanovich_Ostermann-... - part of Russian nobility; the Ostermann name came from his great-uncles.