I've had a few over the years. Probably the silliest was given to me by my dad when I was very young:
Cindy Mae Klunk.
In high school, we needed to have Spanish names to use in Spanish class. Apparently there was no translation for Cindy, so I picked Clara. I took 4 years of Spanish, and many of my classmates thought Clara was my real name.
My current nickname is Bug Lady, of course! Maybe it's more of a title than a nickname. At the arboretum, I am introduced as "Cindy, our Bug Lady". But I'll take it!