who
「何方」 has other readings with different meanings.
which way; which direction; where
失礼ですがどなたですか。
Excuse me, but who are you?
どなたかお医者さんはいませんか。
Is there a doctor here?
どなたでも参加できますのでお気軽にどうぞ。
Anyone can participate, so please feel free.