Family name Олли (Ollie 
, Olli , Olly 
) , across the world, is quite a common cognomen. The cognomen Олли is characteristic of Finland, where it is quite a common surname, Estonia, where it is quite a rare surname, and Albania. In absolute terms, it is the most numerous in the United States, Finland, and Indonesia. More prevalently, Олли is the forename as well as the last name.