SNW S2 EP3 piqued my curiosity in who this character was based off of and so I did a very basic search. I already knew Roddenberry named Khan and Dr. Noonian Soong that way to try to get the attention of his friend, but seems like the friend never noticed and reached out.
My current search yielded a VERY comprehensive post on R3dd!t from 2020 where the OOP and commenters came up with some possible iterations:
Kim Noonien Singh
Kim Noonien Wang
Kim Ngyuen Singh
Kim Noonan Singh
Unfortunately, the trail seems to have run cold as the OOP has not updated on any new leads and the last comment in that thread is a year ago.
Do you think we are ever going to be able to find out who the real life “Khan Noonien Singh” is/was?
One thought just occurred to me… let’s say “Khan Noonien Singh” as a real person was made up because Roddenberry just didn’t want to let the execs win. Why would he then name Dr. Soong what he did in TNG? He couldn’t have liked those strings of syllables that much…?