I agree, irs a lovely name, the issue is it’s such a mouth full no one ever uses it. As such only the nick name is used, so you may as well just name your child the nick name.
the fact the op spells Persy with an s, doesn’t change the fact it’s pronounced Percy, and she will effectively be naming her child Percy if that’s the shortened version she uses.
i don’t know many women who want to be called Percy. I certainly wouldn’t.
I can’t even begin to imagine the amount of bullying a little girl could have if she was called Percy due to Percy pigs. Can you imagine dhe was a little chubby? Even if she wasn’t, Children are cruel.
so as much as it’s lovely, I’d use it as a middle name,or pick a better nick name like Seph or Sephie, and just accept that the nick name is to all intents and purposes her name.
seph and sephie Are lovely, but don’t be calling your daughter Percy.