I have a Henry nicknamed Harry. Aged 9.
Yes it appears high popularity in the name list but we don't have any in the same year at school, any activities we do or any friendship groups.
There is another in the year below him at school and another at camp the other day but we rarely cross over other than maybe on a day out another parent shouting Henry/Harry.
We have alot more obscure names on repeat on different spelling variations at nursery and school.