I'd be interested to hear how that gun left the family, because at least one of his sons (Kermit) was a very avid hunter and adventurer as well.
TR's grandson Archie was my "big boss" at CIA. He came for a visit to Morocco when I was there. Happened to be over Thanksgiving, and we were all gathered with our families for the holiday dinner. Thought my career was at an end when my 15 month old daughter stuck her hand in Archie's wine glass. Then, during dinner, as we're all trying our best at polite conversation, we notice Archie--at one end of the table--playing peekaboo with my daughter, at the other end.
I think Archie cultivated the image of his grandfather: mustache, wire-rimmed glasses, suspenders. Not sure whether it was TR's real Rough Rider hat hanging on the wall in his office, but looked like it could have been.