Not using the first name on your birth cert is ok. In this case Shawn, I believe changed his surname legally. That is something.
Harry Lee dropped Harry via a deed poll.
Shawn's case is actually quite well documented (https://en.wikipedia.org/wiki/Shawn_Huang) - it's more of the timing of when he effected the change from his Indonesian Chinese surname to the Chinese one. Seems like the geist of his controversies centre around other issues than just his name per se.

