Surname ハック (Hakkı 
, Hack 
, Hach 
) , worldwide, is a common last name. The cognomen ハック is characteristic of Guam, where it is quite a common surname, Germany, and Luxembourg, where it is quite a rare surname. In absolute terms, this name is the most popular in Germany, the United States, and Brazil. Much less frequently, ハック is the forename as well as the last name.