https://www.youtube.com/watch?v=2IKo5gXdOTw
https://forum.wordreference.com/threads/be-known-to-by.579094/
https://forum.wordreference.com/threads/the-name-is-known-by-to-many.4066638/
https://tw.forumosa.com/t/known-to-or-known-by/23273
https://www.usingenglish.com/forum/threads/known-to-vs-known-by.207876/
https://reurl.cc/Wx473Z
https://www.taishukan.co.jp/item/blog/?p=620