==Why was his name in Ukrainian added??== 
 He was born in the territory of the Russian Empire, and never lived on the territory of a recognized Ukraine (not in the Ukrainian SSR, and shurely not in todays Ukraine, he died in 1972). When is the name in Ukrainian is added in such cases? When the man considered himself Ukrainian and spoke Ukrainian (like Taras Shevchenko), but Sikorsky spoke Russian, and considered himself Russia, so his really not the person to have his name written in Ukrainian.