Well, looking at the user-submitted info, I see rock mountains seem to be associated and that's exactly what I thought of when I first saw Rockmond. It's pleasant imagery.
I do often like "-mond/mund" names, both masculine and feminine ones. My first impression is that both
Redmond and
Osmond, which I'm already familiar with, sound better to my ear but I'll let Rockmond simmer and see if it can start to grow on me. I think it may the the hard "ck" sound in the middle throwing me a bit.