In all the world, Яцьковський (Яцьковський ) is an extremely rare unknown gender forename. Much more prevalently, Яцьковський is the last name as well as the forename.
Yatskovskii, Yatskovskiy, and Yatskovsky
Олег, Євген, Кирило, Андрій, Дмитро, Василь, Сергій, Володимир, and Олександр
) is an extremely rare unknown gender forename. Much more prevalently, Яцьковський is the last name as well as the forename.