Family name Petrarch (Petrarca 
, Petrarch 
, Петрарка) , all around the world, is quite a rare cognomen. The family name Petrarch is characteristic of Italy, where it is quite a rare surname, Argentina, where it is a rare surname, and Switzerland. Measured by absolute frequency, the name is most common in Italy, the United States, and Brazil. Very seldom, Petrarch is the forename as well as the last name.