I hope you find your cousin Jeremiah....I also hope that ID'ing him as your cousin doesn't 'out' him if he is still flying under the radar. If that concerns you maybe ask a Mod. to move this to the private section.
I can definitely understand the feeling of finding a post and realizing it's a family member too....it's happened to me on this board. Still haven't brought it to his attn yet though. Nervous on how to approach it.
Take care
~TD