I also agree with growlycat that this might be a good opportunity for you to "reclaim your name." In one of my psychology classes, my professor was talking about how the term "b****" (please excuse the language) has long been used to put women down. But then women started reclaiming the word, so that some now say "yeah, I'm a b****, what of it?" Women might also refer to their friends with this word. Not the best example because obviously that word is still offensive, but I hope that makes sense. It could be a way for you to reclaim power from your grandmother.