Family name Sergeiy (Сергеиы , Sergeiy ) , around the world, is an extremely rare cognomen. Much more frequently, Sergeiy is the forename as well as the last name.
Сергеий, Сергейий, and Сергеый
Zuev, Sapiga, Eponchincev, and Pyatkovskyy
, Sergeiy 
) , around the world, is an extremely rare cognomen. Much more frequently, Sergeiy is the forename as well as the last name.