Globally, Du Sai (Du Sai 
) is a very rare dominantly female, but infrequently male given name. The first name Du Sai is characteristic of Sub-Saharan Africa, particularly Nigeria, where it is a very rare largely female, but seldom male name. Also, Du Sai is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Du Sai | Nigeria |