In the entire world, Kostuś (Kostuś ) is an extremely rare unknown gender first name. Much more frequently, Kostuś is the last name as well as the forename.
Kostus
Anna, Marta, Jerzy, Daniel, Tomasz, Martyna, Karolina, Krystyna, and Agnieszka
) is an extremely rare unknown gender first name. Much more frequently, Kostuś is the last name as well as the forename.