Ok, so Grace is currently ranked 15th and Poppy 13th so she would be very unluckily to be one of ‘multiple’ in her class. Yes, they are popular, but what some posters fail to realise is that unusual names are not for everyone. Also, so many people are trying to be ‘original’ nowadays it’s starting to backfire! I had a mother in baby group boasting about how ‘unusual’ her wonderful daughters name is only to have another mother rock up half an hour later with a child with the same name. Her face was a picture. Your little Persephone could be one of two in her class yet there could only be one Emily! Just go with what you like and don’t focus on all the ‘oh couldn’t you think of anything more interesting eye roll’ crap!
FWIW I prefer Grace.