Last name Маттеи (Mattei 
, Matthey , Matthei 
) , all around the world, is a common cognomen. The family name Маттеи is habitual in Italy, where it is quite a common surname, Switzerland, and Puerto Rico, where it is quite a rare surname. In absolute terms, the name is most common in Italy, France, and Brazil. Much less frequently, Маттеи is the forename as well as the last name.