One person who's very prominent in the best-written historical fiction (well researched and clearly delineates what's historical fact and what's speculative) is Princess Elizaveta of Kiev, who was the official wife (he also had a common law wife) of Harold Hardarda. He was the King of Norway who invaded England just prior to the Battle of Hastings. He lost, but it weakened English forces, which led to Norman victory in the Battle of Hastings.
According to the maps at that time, there were no "Ukranians". I'm surprised that no one is bringing up that perhaps there is no justification for a coup in what is now western Ukraine should control the rest of the country.