I was extremely skinny when I was a young boy. My father said I looked like Gandhi which he pronounced like Randy. I hated the nickname, which gave him much joy. He was the only one to ever call me that and he did so until he died. He was an alcoholic and alcohol made him mean. It was the booze that killed him. At some point, I came to terms with my late father.
I started using gandy as part of my email addresses. I'm a member of another forum using that for a nick. I tried to use it here but couldn't so I added marsh because my hometown is Marshfield.
One thing that is curious to me is that many people, in replies to me, want to capitalize gandy or gandy and marsh as if it's my name.