Cognomen Полли (Polly 
, Polli 
, Polley ) , throughout the world, is a common last name. The surname Полли is habitual in Estonia, where it is quite a common surname, Switzerland, where it is quite a rare surname, and Hong Kong. In absolute terms, the name is most common in India, the United States, and Brazil. Likewise, Полли is the forename as well as the last name.