Family name Sierzant (Sierzant 
) , worldwide, is a rare surname. The surname Sierzant is habitual in Poland, where it is a rare surname, Belgium, and New Zealand, where it is a very rare surname. Not in comparison with a country's population, this name is the most popular in Poland, the United States, and Belgium. Likewise, Sierzant is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sierzant | Canada, United States, Belgium, United Kingdom, Poland |