Whoever, he who, they who.
With antecedent as subject.
What person or people; which person or people; asks for the identity of someone; used in a direct or indirect question.
With antecedent as object: whom.
A person under discussion; a question of which person.
whose
The person(s) whom; whomever.
As the object of a verb.
As the object of a preposition.
Used to refer to a previously mentioned person or people.