I'm quite sure that Tyndareus (TYND1 and TYND2) are the same person. Tynd 1 is described as the Spartan king. His son should be Castor, the argonaut and the brother of Pollux, however Castor is marked as the son of Tynd 2. This piece of information, along with the lack of reference to there being two Tyndareus' leads me to believe they should be the same person. I will confirm this with Dr. Bowman.