Family name Jankok (Jankok 
) , around the world, is a very rare surname. The surname Jankok is characteristic of Netherlands, where it is a very rare surname, Thailand, and the United States, where it is an extremely rare surname. Much less frequently, Jankok is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Jankok | Netherlands, United States, South Africa, Thailand |