Surname Тонелли (Tonelli 
, Тонелли 
) , throughout the world, is a common cognomen. The cognomen Тонелли is characteristic of San Marino, where it is quite a common surname, British Virgin Islands, and Italy. In absolute terms, this name is the most popular in Italy, Brazil, and Argentina. Very seldom, Тонелли is the forename as well as the last name.