Surname Sinji (Sinji 
) , globally, is a rare cognomen. The family name Sinji is characteristic of Lebanon, where it is quite a rare surname, Kuwait, where it is a rare surname, and Tanzania, where it is a very rare surname. Not in comparison with a country's population, it is the most numerous in Lebanon, Indonesia, and Tanzania. More prevalently, Sinji is the forename as well as the last name.