Surname サク (Saku 
, Sak 
, サク ) , around the world, is a common last name. The family name サク is habitual in Western Asia, particularly Turkey, where it is quite a common surname, Oman, where it is quite a rare surname, and Qatar. In absolute terms, it most frequently occurs in Turkey, Bangladesh, and Poland. Likewise, サク is the forename as well as the last name.