Here are some options you could use, depending on the context:
* "Aiden": This is the most straightforward option, as French often adopts English names without significant changes.
* "Éden": This name shares a similar sound and meaning with "Aidan" (meaning "little fire" or "fiery one") and is a common French name.
* "Aydan": This is another pronunciation variation of "Aidan" that might be easier for French speakers to pronounce.
Ultimately, the best way to say "Aidan" in French depends on your preference and the specific context.