1. Use the English pronunciation:
* "Roxy" would be pronounced as "Roh-ksee" in French.
2. Find a French name that sounds similar:
* Roxane: This is a common French name that is pronounced very similarly to "Roxy".
* Roxana: Another French name that is similar in sound.
3. Use a nickname:
* You could use a nickname for "Roxy" in French, such as "Ro" or "Rox".
The best option really depends on the context and what you are trying to achieve.