I must be channeling your grandma. When my then 7 year old grand-nephew was visiting me, he told me about the bullying he was going through at school. His name is Donald, and the kids were calling him Donald Duck. It upset him, and the kids knew it.
My response was, "Well, if that's the worst they ever call you, you're in pretty good shape."
He thought about it. When he returned to school the following week, he just blew all the bullying off and it stopped very quickly. He's 17 now and very popular in HS. Sometimes the little things we say to a child make a big difference in their lives.