Is Whom a Proper Noun?

Answer 1

No, the word 'whom' is not a noun at all.

The word 'whom' is a pronoun; an interrogative pronoun and a relative pronoun.

The pronoun 'whom' is the objective form of the subjective pronoun 'who'.

The interrogative pronoun 'whom' introduces a question as the object of a preposition.

Example: To whom do I give my completed application?

The relative pronoun 'whom' introduces a relative clause as the object of a preposition.

Example: The customer for whom we made the custom cake will pick it up at ten.