Hi There! Yay! You found a cousin! I forwarded your message to my Mom, as she is the researcher with all the info you want on the Jennings family. But I wanted to touch base just in case you don't hear from her right away and things get lost.Here is a link to our RootsWeb area with the Jennings information.By the way, I've been to those family reunions at the Cemetary when I was a teenager. :-) I believe we even have pictures of Zachariah's tombstone.
We also have a book on our Jennings family genealogy that was produced by the DAR (Daughters of the American Revolution)