All around the world, Костецкьий (Костецкьий ) is an extremely rare unknown gender first name. Much more frequently, Костецкьий is the last name as well as the forename.
Kostetskii, Kostetskiy, and Kostetsky
) is an extremely rare unknown gender first name. Much more frequently, Костецкьий is the last name as well as the forename.