Legally Changing My Last Name

Question:
Should I legally change my last name? My grandfather's last name was [name removed]. He married my grandmother and had several children. My grandfather passed away when my father was young, he then was taken care of by a neighborhood family who took him in as his own. When my dad arrived to the United States, he kept that neighbor's last name. Married my mother and had 2 children, myself and brother. All of my uncles, aunts and cousins, kept my grandfather's last name. I've never liked my last name, it doesn't feel right and I always told my dad he should of kept my grandfather's last name and not some other family who's not even connected to us in any way. I have a strong sense to change my last name to [grandfather's last name]. I feel like the neighborhood name has a lot of bad karma. They have a history of incest and rape. Any insight would be helpful.

Answer: (Responses to questions rely on the accuracy of the name and birth date provided with the question. Typographical errors or incomplete information can result in an incorrect response.)