Okay, just came to the realization that, directly following baby Harry's defeat of the Dark Lord, around 60% of the newborn male wizarding population would be named "Harry". And roughly 20% of the newborn female wizarding population would be named "Harriet".
So, from, like, Harry's 3rd year onwards, the sorting ceremony would sound like this:
And some mothers would, like, switch it up a little:
So, it's 3rd year, Sirius Black is on the loose, Dementors about to board the train, and a bunch of excited first years are like