Sigh. This is the original Catastrophe from which the Ukraine never really recovered.==
It wasn't Ukraine at that time it was central of Kiev Rus. By "ukraine" (forest ukraine) at that time was called Northern Rus: Vladimir-Suzdal duchery& Tver duchery& Novgorod with Pskov. Which is now central Russia:).
The lands around Kiev was called "Ukraine" when becomes attached area to Great Luthvinia.
Basically, it does not matter much. Those were all our ancestors...