Anyone train under these folks?

[IcemanSK]

I was looking at the list of gentlemen who designed the Tae Geuk poomsae. I don't know if any are still alive (other than GM Park, Hae Man). If wondering if anyone has training under any of them or can trace their lineage to them?

Kwak, Kun Sik (Chung Do Kwan)
Lee, Young Sup (Song Moo Kwan)
Hyun, Joon Myung (Oh Do Kwan)
Kim, Soon Bae (Chang Moo Kwan)