Worldwide, Sai Wan (สายวรรณ 
, Sai Wan 
) is a very rare principally female, but very infrequently masculine given name. The forename Sai Wan is habitual in South-eastern Asia, particularly Thailand, where it is a very rare mostly feminine, but infrequently male name. Also, Sai Wan is the last name as well as the forename.