Our 3 have quite traditional names, that I never shortened to nicknames., but I do hear others call my sons by their shortened version.
I always did like Joelle, by DH thought it was a bit too French. I liked the soft-j sound, but I knew others would pronounce the hard j.
Also, we have a ton of Marie's (Mary, Marija) in our family trees, so I regret that I didn't use it as a middle name for DD instead of the ubiquitous Lynn as middle name. It was chosen because it flowed with her first name, and had no family ties at all, but it is boring (to me - no offence to any Lynn's!)
I also liked Glen, simple and masculine, but DH had an association with a bully from school, so it was nixed.