Last name Джиллиан (Gillian 
, Jillian , Джиллиан 
) , in the world, is quite a common family name. The surname Джиллиан is characteristic of Cameroon, where it is quite a rare surname, Israel, and Honduras. In absolute terms, it is commonest in Cameroon, the United States, and Spain. Much more frequently, Джиллиан is the forename as well as the last name.