Growing up, my family shortened my name to the mono-syllabic "Kels". It was totally natural, and I don't mind it at all. I never really noticed that it was a nickname until moving to Minneapolis. Then, through making new friends, I realized that it was a pretty good indicator of when people were comfortable around me. Usually, about a month or so into a relationship, people start using "Kels" when talking to/about me, even if they have no contact with my family or people who use "Kels". I usually never tell people this, because I'm still testing my theory. So far, the data has been very consistent, and as I assume the only people that would even think of reading this have known me for at least a year, I'm not too worried about spoiling the social experiment. How does this relate to the present? (I'm glad you asked.) In the last week, people in Res. have finally started calling me "Kels".
Not totally related, but somewhat interesting: I also answer/have in the past answered to "Kelso", "Ryn-Ring", "Ke-Ru-Shi", "Dawn", "Lady Rosalyn", "YOU", and "Elsie" (to name a few).