Is it normal that i can't get this childhood memory to go away?

I was 14, and thinking of a name for the terrier mix I got for my birthday. She's dark grey with patches of caramel, and covered in fluffy fur. It was late at night and my mother asked me, "Well Missy, what are you going to name her?" (Missy wasn't my name, just a nickname.)
I'll never forget the mortified look on her face when I answered "Lucy". She started raving about how if I named her that I could invite evil spirits (Lucy is furry. Lucyfur=Lucifer). I stared at my mother for a minute straight while she quoted bible scriptures at me. Then I called my dad and I live with him now. I think about this almost everytime I look at my Lucy. It's also made it hard for me to stay a Christian.