Cognomen Цилли (Silli 
, Cilli , Cilly ) , throughout the world, is quite a common family name. The family name Цилли is characteristic of Italy, where it is quite a rare surname, Austria, where it is a rare surname, and Slovakia. Measured by absolute frequency, the name is most common in Italy, India, and the United States. Likewise, Цилли is the forename as well as the last name.