Is it normal to be traumatized by a name?

My mom named me after a woman who was claimed to have taken good care of her. At an early age, I took on that it wasn't a very common name parents gave to their children. I would literally have a 5 min conversation with someone every time I would introduce myself. It was irritating, but I shook it off at the time. As an insult to injury, the woman I was named after was often cruel to me. She would shriek at the top of her lungs when I wouldn't do something right. There was an instance where I almost drowned, and she just continued yelling. As I grew, I dreaded it even more. At the time I just found out that the so called "Angel" I was named after had to evacuate the country for stealing and never paying back her credit card debts. After I found out, I was even more embarrassed and dreadful of my name. Not to mention, I had a pretty bad childhood. I was awkward, fat, self-conscious, and bullied for all of these. I feel like I'm still carrying the memory of those instances by still holding on to my name. My parents agreed to change it, but of course they are known for making promises they can't keep. My mom is pissed off at me for bothering her about it, saying that people already call me by my new name. I'm moving up to high-school next year, and am petrified of just hearing the teachers call out attendance and reading my legal name. I told her that I didn't agree with her, telling her that I needed it legally changed on paper. She ended the conversation saying how it's too expensive, and she threw a fit directed at me. I cry and feel extremely embarrassed by just hearing my legal name being said.