Миколай

Etymology
From.

Usage notes

 * The form Мико́ла remains in active use today, while the form Микола́й is of largely historical use (e.g. Святи́й Микола́й (St. Nicholas)). However, Микола́й is used as the base for patronymics and other derived terms: hence, the patronymic of Мико́ла is Микола́йович instead of the expected Мико́лович.