Cognomen Rengku (Rengku 
) , in all the world, is a rare last name. The cognomen Rengku is characteristic of Indonesia, where it is a rare surname, and India, where it is an extremely rare surname. Very seldom, Rengku is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rengku | India, Indonesia |