Throughout the world, Sïn (Sïn 
) is quite a rare dominantly feminine, but infrequently boy's given name. The forename Sïn is characteristic of Northern Africa, particularly Algeria, where it is quite a rare largely feminine, but uncommonly male name, Tunisia, where it is a rare girly name, and Morocco, where it is a very rare feminine name. Very seldom, Sïn is the last name as well as the forename.