Nikolai \n(i)-ko-lai\ as a boy's name is a variant of Nicholas (Greek), and the meaning of Nikolai is "people of victory".
The baby name Nikolai sounds like Nikolay and Nicolai. Other similar baby names are Nikolas, Nikolos, Nikolaus, Niklas, Nikkolay, Nikkolas, Nicoli, Nicolay, Nicolas, Nicolao, Nicola, Nickolas and Nicholai.