1. If you're referring to the character:
* Noddy: You can simply use the English name, as many English names are used in French.
* Noddy: You can pronounce it as in English, which is fairly close to the French pronunciation.
2. If you're trying to describe someone who's nodding:
* Faire signe de tête: This literally means "to make a sign with the head", and it's the most common way to say "to nod".
* Hocher la tête: This means "to shake the head", but it's often used to refer to nodding.
3. If you're trying to describe a person who is naive or gullible:
* Naïf/Naïve: This is the most common way to say "naive" in French.
* Crédule: This word means "gullible".
Ultimately, the best way to translate "Noddy" depends on the context.