English:
* NOO-n-ez (with the stress on the first syllable) is the most common pronunciation in English.
* NYOO-n-ez (with the stress on the second syllable) is less common, but still acceptable.
Spanish:
* NOO-n-eth (with the stress on the first syllable) is the most common pronunciation in Spanish.
Portuguese:
* NOO-n-esh (with the stress on the first syllable) is the most common pronunciation in Portuguese.
Other languages:
* In some other languages, the pronunciation may be different. For example, in French, it might be pronounced noo-nez.
To be sure about the correct pronunciation in a specific context, you should ask the person who is using the name.