Family name Zwennis (Zwennis 
) , worldwide, is a rare last name. The last name Zwennis is characteristic of Netherlands, where it is a rare surname, Portugal, where it is a very rare surname, and South Africa. Measured by absolute frequency, the name is most common in Netherlands, South Africa, and France.
| VARIANT | COUNTRY |
|---|---|
| Zwennis | Portugal, South Africa, Thailand, France, Netherlands |