I will try and find the source. I am currently trying to sort out what is right and what is wrong. Information is sketchy at this point. Any correction is welcome!Very interesting. I have never heard these two gentlemen were related (and Korea is notorious for having a paucity of surnames so it can be hard to be sure who exactly is related to whom). Do you have a source for this information about them being related?
Jhoon Rhee was actually a member of the Chung Do Kwan before founding his own style of Taekwon-Do. He may well still be considered a member of the Chung Do Kwan, despite this, and was promoted to 10th dan in Chung Do Kwan by Lee, Won Kuk (Chung Do Kwan founder) in 1998.
Yes, I stand corrected. I have found another source to verify this:
Taekwondo Forum ? View topic - Chung Do Kwan & Won Kuk Lee by Kyo Yoon Lee
See "Graduates of the Chung Do Kwan were" #17 - Jhoon Rhee
Thanks for your help so far Chris.