Cognomen לואיזי (Luisi 
, לואיזי 
) , all around the world, is quite a common family name. The cognomen לואיזי is characteristic of Italy, where it is quite a rare surname, Luxembourg, and Uruguay. In absolute terms, the name is most common in Italy, the United States, and Argentina. Very seldom, לואיזי is the forename as well as the last name.