Name of Ukraine – Wikipedia

The name Ukraine (Ukrainian: Україна, romanized: Ukrayina [ʊkrɐˈjinɐ] (), Вкраїна Vkrayina [u̯krɐˈjinɐ]) was first used in reference to a part of the territory of Kievan Rus’ in the 12th century. The name has been used in a variety of ways since the 12th century, referring to numerous lands on the border between Poland and Kievan Rus’ or its successor states.

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