Mykolaichuk () is a Ukrainian patromymic surname. It may also be rendered as Mikolaichuk or Mikolaychuk. Ukrainian surname:
Ivan Mykolaichuk Maria Mykolaichuk
See also
8244 Mikolaichuk, minor planet 8244 Mikolachuk, minor planet
ru:Миколайчук uk:Миколайчук