I've written Bong and had people say "shouldn't we write Joon-Ho, since it's the latter of the two names, and in print it's still Bong Joon-Ho, unlike, say, Doona Bae, who now goes as that when in America?"

Then I've written Joon-Ho and gotten the obvious comments about how it's technically wrong back.

I'll just change it to the full name and end the debate, lol.