What is the object pronoun of who?

Answer 1

The corresponding object pronoun of the subject pronoun 'who' is whom.

The pronouns 'who' and 'whom' are both interrogative pronouns and relative pronouns.

An interrogative pronoun introduces a question. The antecedent of an interrogative pronoun is often the answer to the question.

Examples:

Who is your new neighbor? (subject of the sentence)

To whom should I give my completed application? (object of the preposition 'to')

A relative pronoun introduces a relative clause which gives information about its antecedent.

Examples:

My new neighbor who comes from Boston is a Mr. Jones.

The person to whom you give your application is the manager.