Family name Kiliyan (Kiliyan 
, Килиян 
) , globally, is a very rare surname. The cognomen Kiliyan is habitual in Russia, where it is a very rare surname, Kazakhstan, and Ukraine, where it is an extremely rare surname. In absolute terms, the name is most common in Russia, India, and Kazakhstan. More prevalently, Kiliyan is the forename as well as the last name.