Co-workers have started pining for nicknames, but they're all civilians, and civilians lack the built in "first name" of a military rank. I'm questioning what I should do for them, particularly given that approximately 95 percent of the people with whom I interact at this point aren't in the military. First initial and then nickname? That's what I went with below, but I'm reserving the right to change it at any moment. If you feel strongly, weigh in in the comments section. This seems better crowdsourced.