Globally, Hilenko (Hilenko , Гіленко , Хиленко ) is an extremely rare unknown gender forename. Much more frequently, Hilenko is the last name as well as the forename.
Гиленко, Гильенко, and Хіленко
Darya, and Tatyana
, Гіленко 
) is an extremely rare unknown gender forename. Much more frequently, Hilenko is the last name as well as the forename.