whom
(pronoun)
pronoun
1. What person or people; which person or people, as the object of a verb.
- Whom did you ask?
2. What person or people; which person or people, as the object of a preposition.
- To whom are you referring?
3. Him; her; them (used as a relative pronoun to refer to a previously mentioned person or people.)
- He's a person with whom I work.;