When spouse was in 2nd grade (1961), there were four other kids in his class named John. Teacher decided that each of the Johns would be addressed by their initials
Spouse became JK and never looked back. There are people who have known him 20+ years who don't know what the 'J' stands for
Anyway, once upon a time he needed to carry business cards, and a friend came up with this design (contact info is on the back). I found this in a jacket pocket today and could not love it more