With antecedent as object: whom.
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.
Whoever, he who, they who.
A person under discussion; a question of which person.
whose
a gender-neutral third-person singular subject pronoun, equivalent to singular they, and coordinate with gendered pronouns he and she.
The name of the Cyrillic script letter З / з.