Last name Jae-Gu (재구 
, Jae-Gu) , across the world, is an extremely rare cognomen. Much more frequently, Jae-Gu is the forename as well as the last name. Parts of the name also exists independently as a first name Jae, and a last name Gu.
| VARIANT | COUNTRY |
|---|---|
| 재구 | South Korea |