Your chosen name is the person you are and will be. Your given name is who you were. I'm not entirely sure about the whole name given by your grandfather thing, but it doesn't hurt to ask your family to respect your decisions.
After a while of everyone around me calling me Katie, it's bizarre when I visit my family and I'm back to Casey/Case/Caser/etc.. But they're my family and I'm going to be patient with them. I will say that when my mom called me Katie in public the first time, it was a big deal for me and I teared up. I didn't realize how much it mattered to me until then.
Maybe moving is the answer, maybe insisting with your family, who knows. You're going to have to try something. My childhood home is somewhat comforting, but I don't feel comfortable moving back because it feels too much like trying to inhabit the place where my old self resides, that I don't particularly like much and was very unhappy being.
Hugs,
- Katie
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