Prometida or prometido

Prometida or prometido
 

David is writing a letter to someone telling him that his best friend Paul has a prometida called Clair

Should it be prometida or prometido because Paul is a man.

prometido (nm)
Paul is the prometido, since he is the fiancé.

prometida (nf)
Clair is the prometida, since she is Paul's fiancée.

Paul, el prometido, has a prometida named Clair.

Yes but in the sentence
David is writing a letter to someone telling him that his best friend Paul has a prometida called Clair

should it be prometida or prometido. Is the subject Paul or Clair? If it is Paul then it is prometido

Only one is correct in the sentence.

It depends on the sentence to define the "subject".

If the subject is Paul and he is going to marry Clair, the only right word is "prometida":
- Clair tiene un prometido que se llama Paul. -> The subject here is Clair.
- Paul tiene una prometida que se llama Clair. -> The subject here is Paul.


But the "subject" they're referring to in the instructions would need another formulation of the sentence.
- La prometida de Paul se llama Clair. -> The subject is "La prometida de Paul".
- El prometido de Clair es Paul. -> The subject here is "El prometido de Clair".