There (especially as an expletive subject of be).
People; some people; people in general; someone, excluding the speaker.
A single person, previously mentioned, but typically not if previously named and identified as male or female, especially if of unknown or (since 21st century) non-binary gender.
A group of entities previously mentioned.
Their.
The, those.
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.
Whoever, he who, they who.
whose
A person under discussion; a question of which person.