Family name 思斯 (Sisi 
, 思斯 ) , all over the world, is a common last name. The family name 思斯 is characteristic of Algeria, where it is quite a common surname, Lebanon, and Macao, where it is quite a rare surname. In absolute terms, the name is most common in Northern Africa, particularly Algeria, Egypt, and Morocco. Likewise, 思斯 is the forename as well as the last name.