Here are a few possibilities:
* Woński: This is a common Polish surname that means "someone from Wońsk" (a town in Poland).
* Wójs (pronounced Voy-sh): This surname, meaning "village elder", could have been shortened to Wons.
It's difficult to know for sure without more information about your family history.
To confirm the original spelling:
* Research your family tree: Look for records of your ancestors' names, particularly birth certificates or marriage licenses.
* Contact a genealogist: A professional genealogist can help you research your family history and find the original spelling of your surname.
* Contact the Polish Genealogical Society: They may have records or resources that can help you trace your family's origins.
It's always fascinating to learn about the origins of your last name!