How to pronounce who:
(interrogative) what person or people; which person or people; asks for the identity of someone. (used in a direct or indirect question)
Example: "I don't know who it is. (indirect question)"
(interrogative) what is one's position; asks whether someone deserves to say or do something.
Example: "I don't like what you did, but who am i to criticize you? i've done worse."
(relative) the person or people that.
(relative) whoever, he who, they who.
Example: "It was a nice man who helped us."