Cognomen Penkul (Penkul 
) , throughout the world, is a rare last name. The surname Penkul is characteristic of Thailand, where it is a rare surname, the United Kingdom, where it is a very rare surname, and Canada, where it is an extremely rare surname. Measured by absolute frequency, it is commonest in Thailand, the United Kingdom, and the United States. Also, Penkul is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Penkul | United Kingdom, Poland, United States, India, Thailand |