Prometida or prometido

[Desmond]

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.

[Rusty]

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.

[Desmond]

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.

[AngelicaDeAlquezar]

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".