Cognomen Кубілюс (Kubilius 
, Кубілюс 
) , in the world, is quite a rare last name. The family name Кубілюс is characteristic of Northern Europe, particularly Lithuania, where it is quite a common surname, Latvia, where it is quite a rare surname, and Estonia, where it is a rare surname. In absolute terms, it is commonest in Lithuania, the United States, and the United Kingdom.