1. Мануэль (Manuel): This is the most direct and common translation, transliterating the name directly.
2. Мануил (Manuel): This is a more traditional Russian form of the name, which might be preferred in some contexts.
3. Ману (Manu): This is a shortened version of both "Manuel" and "Мануил".
Ultimately, the best way to say "Manuel" in Russian depends on the context and your preference.