In all the world, Šejko (Шейко , Sejko , Šejko ) is an extremely rare masculine forename. Much more frequently, Šejko is the last name as well as the forename.
Scheiko, Schejko, and Sheyko
, Sejko 
, Šejko 
) is an extremely rare masculine forename. Much more frequently, Šejko is the last name as well as the forename.