Across the world, Korostii (Korostii , Коростий ) is an extremely rare unknown gender first name. Much more frequently, Korostii is the last name as well as the forename.
Коростии, and Коростій
Georgii, and Alexandr
, Коростий 
) is an extremely rare unknown gender first name. Much more frequently, Korostii is the last name as well as the forename.