You can read more about our hero, Gryla, here and here. This is where I got my info on the Yule Cat. And for Frau Perchta, you gotta click right here. Happy whatever you celebrate, weirdos!
Resources for Befana
I tried to find the video of everyone dressed as this adorable, much nicer than the other ones, Christmas/Epiphany good witch but I couldn’t really find it. Here’s the wikipedia link though, and also another article about it as well! Also, here’s an event page for the “kids meet Befana” day in Bologna which I thought was cute.