Here are a couple of options:
* Sianne: This is the closest phonetically. It is a rare French name of Welsh origin, meaning "God is gracious."
* Chantal: This is a common French name that has a similar sound and meaning. It means "stone" or "rock" in French.
Ultimately, it depends on what you are trying to achieve. Are you looking for a name that sounds similar? Are you looking for a name with a similar meaning? Depending on your goal, there are different options that could be suitable.