Family name Bongsu (봉수 
, Bungsu 
, Bunso 
) , all around the world, is a common cognomen. The cognomen Bongsu is characteristic of South-eastern Asia, particularly Brunei, where it is quite a common surname, Indonesia, where it is quite a rare surname, and Malaysia. In absolute terms, it most frequently occurs in Indonesia, Malaysia, and Saudi Arabia. Also, Bongsu is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 봉수 | South Korea |
| Bungsu | Malaysia, Taiwan, Saudi Arabia, Indonesia, Philippines |
| Bunso | Malaysia, Saudi Arabia, Japan, United Arab Emirates, Philippines |
| Bongsu | Malaysia, Brunei, Indonesia, South Korea, Philippines |