The Russian boy's name Kolya is the diminutive form of the name Nikolai (or Nikolay). This is a unique alternative to the popularly used name of Nicholas but retains its strong and symbolic meaning of "victory of the people."
The name Nicholas and its many variations have been used throughout history. Is is the name of several popes and two Russian czars. It is also popularly known as the name of Saint Nicholas after whom Santa Claus is based.
While Nicholas is a wonderful name in and of itself, it is quite widely used and is in the top 100 U.S. baby boy names since 1972. Kolya is a good option if you want a more modern take on a traditional name.