I come from a Catholic family, so my sister and I both have biblical names. I'm the oldest, and I was supposed to be named after my mother's mother (Mary) but my mom in some sort of semi-rebellious fit named me Rebecca after a character in a book. My middle name is my father's mother's name and also a great-aunt on my mom's side. When my sister was born, she got the name Mary to satisfy my grandmother. The only other "Rebecca" I'm aware of in my family was a 16-year-old great-great-great-great aunt who died when the oven exploded when she was baking a cake for a school fair. I was
really careful around the oven the year I was 16.
And, Tropez, I have a similar dilemma about my last name. My father died when I was 13, and I like neither the name nor his family. My mother's maiden name is not nice-sounding, or I would have changed it a long time ago. I think, yes, it is disrespectful in a way to change your name, but he won't know about it anyway and you should do it if you want to. Who cares what other people think. It doesn't change whether or not you loved your father and it is also good to carry on a name from the other side of your family too, right?