Ukrainian State (Ukrainska Derzhava). The official name of Ukraine under the Hetman government of Pavlo Skoropadsky, formally announced on 29 April 1918 in the Manifesto to the Entire Ukrainian Nation and the Laws on the Provisional State System of Ukraine. The legal structure of the Ukrainian State was a distinctly Ukrainian variant of a constitutional monarchy, based on some aspects of the traditional Cossack Hetman state of the 17th and 18th centuries. The name appeared on official seals and currency until the fall of the Hetman government on 14 December 1918.
Encyclopedia of Ukraine