Kolja (Russian), Kolya (Russian), and Nil (Russian) are other variants of the name.
Nikolai is rather popular as a baby boy name, and it is also perceived as trendy. The name's popularity has been growing since the 2000s; before that, it was of only very modest use. Its usage peaked recently in 2012 with 0.021% of baby boys being named Nikolai. It was #607 in rank then. In 2012, among the family of boy names directly related to Nikolai, Nicholas was the most regularly used. It was 18 times more widely used than Nikolai in that year.
Baby names that sound like Nikolai include Nahiel, Nakula, Neahal, Niccolai, Niccolo, Niccolò, Nichola, Nicholai, Nicholas, Nicola, Nicolae, Nicolai, Nicolao, Nicolas, Nicolau, Nicolay, Nicoli, Nicolo, Nicolò, and Nigella.
† Pronunciation for Nikolai: N as in "knee (N.IY)" ; IY as in "eat (IY.T)" ; K as in "key (K.IY)" ; AA as in "odd (AA.D)" ; L as in "lay (L.EY)" ; AY as in "side (S.AY.D)"
Details of famous persons named Nikolai:
Novelist Nikolai Gogol, born 31 March 1809 - 4 March 1852, Sorochyntsi, Russian Empire.
Russian Czar Nikolai Aleksandrovich Romanov (Czar Nicholas II), born 6 May 1868 - 16 July 1918.