Last name Gylyan (Гилян , Gylyan ) , globally, is an extremely rare family name. Much more frequently, Gylyan is the forename as well as the last name.
Гилиан, Гылян, and גיליאן
Carter
, Gylyan 
) , globally, is an extremely rare family name. Much more frequently, Gylyan is the forename as well as the last name.