Cool quiz! Got 63 from the first try, but there are at least 5-10 more, including Morfin Gaunt, which I would have gotten, if I knew the spelling. Reading a book not in the original language (and alphabet) has its downsides.
Are we sure that Alicia Spinnett is not mentioned more often? She's almost always mentioned at the same time as Katie Bell, as they are both chasers on the Gryffndor Quidditch team. I find it hard to imagine that Grawp and Elphius Doge get more mentions that Alicia Spinnett.
I also figured Justin Finch-Fletchley, Hannah Abbott and Susan Bones would also have high numbers of mentions.
Katie Bell might be mentioned more than Alicia Spinnett because she was the one who ended up being cursed and involved with the necklace that was supposed to go to Dumbledore in the 6th book.
You should add Mrs. Noris (I don't know how to spell her name) she is Filches cat and gets mentioned just about the same amount that he does if not more.
Mrs. Norris just missed the cut to be featured in this quiz. Spoiler alert: she's #102 (definitely less mentioned than filch) and you can find her in the Harry Potter Top 200 Characters quiz!
Very nice quiz by the way, loved that
I also figured Justin Finch-Fletchley, Hannah Abbott and Susan Bones would also have high numbers of mentions.