Contact Keith. I'll be he gets a laugh out of it weather or not he's "that" Keith. I agree with Nancy.
A couple years ago rumors were circulating in my wife's family that one of her brothers was dead. Nobody had heard from him in a very long time. Yet nobody wanted to call him. Even my wife was tongue tied. So I called the BIL and said: "Is this XXXXX? He said tentatively .... yes. Then I told him who I was and asked , did you know you're family thinks your dead? He sputtered and then started laughing. He was just living his live and not giving the family any extra thoughts.
Contact him. I'll bet he gets a chuckle out it.