I’m afraid of coming across as a tad presumptuous here, but it seems like you’re looking for suggestions, and I have one.
Right now the favourites page is just a list of names sorted alphabetically. Could the gender perhaps be marked next to each name? One way to do this would be to replace the bullet point for each item with a gender icon, but any type of visual clarification would be great. As my favourites list gets longer, I’m afraid it’ll become harder to skim.
Great site, BTW. I like in particular how easy it is to see a name’s popularity and its variations all on the one page.