Though they weren't all originally from Kentucky, or born here, they joined the expedition inKentucky and Clark referred to them as the nine young men from Kentucky.
This article has info on all of them.
http://www.lewisandclarkinkentucky.org/people/9youngmen.shtml
This article has info on all of them.
http://www.lewisandclarkinkentucky.org/people/9youngmen.shtml