Grandson 1 has a beautiful name and unusual name. When I was told it I had no idea who the celeb was who had the same name. That might be due to my age or I didn't care that they had the same name. He was named because his parents liked the name.
Don't worry about the names you have picked out. If you really like them when asked all you have to say is you used the names because you liked them.

Nelle, skerrick needs to come back as a word