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In the world, Mikolaj (Mikołaj , Mikolaj , Миколай ) is a common masculine forename. The forename Mikolaj is characteristic of Poland, where it is quite a common masculine name, Ukraine, where it is quite a rare masculine name, and Ireland. Not in comparison with a country's population, it is the most numerous in Poland, Ukraine, and the United Kingdom. Likewise, Mikolaj is the last name as well as the forename.
Mikolaj is also a popular name for the fictitious and mythical characters: Nicholai Zinoviev , the fictional character from the video game series Resident Evil, Resident Evil 3; Nikolai Rostov , the fictional character from War and Peace; Prince Nikolay Bolkonsky , the father of Prince Andrey Bolkonsky, War and Peace; Nikolai Sergueych Ikhmenev , the character from Dostoyevsky's Humiliated and Insulted and Nikolai Orelov , the Assassin’s Creed character, Assassin's Creed, and in many other works.