Welcome aboard,LeFever. "Uncle Dan" LeFever made some of the best shotguns ever made. Many are still in use today. Some of his designs were built to compensate for wear. So, they are as tight today as they were when new.
He also pioneered some some barrel technology, including choke tapers, overboring, long forcing cones and other esoterics.
He was involved with a series of partnerships and companies. While a genius at design and manufacture, he doesn't seem to have been as good at business.
Upland Almanac had an article in a recent issue about him and them. You may want to call them and ask for a copy. They give out free copies to get new subscribers. Unfortunately I gave my copy to a friend.
You have a great shotgun heritage.
Harley's forum on this site may be a good place to ask about your ancestor.
Also....
There's a forum for Shooting Sportsman Magazine at shootingsportsman.com. Some historians hang out there who may be able to give you more input.
HTH, Dave....