Around the globe, Allan-Vang-Sy (Allan-Vang-Sy 
) is a rare boy's forename. The first name Allan-Vang-Sy is habitual in Sub-Saharan Africa, particularly the Democratic Republic of the Congo, where it is a rare masculine name. Parts of the name also exists independently as a first name Allan, a last name Vang, and a last name Sy.
| VARIANT | COUNTRY |
|---|---|
| Allan-Vang-Sy | Democratic Republic of the Congo |