Author here. That connection to George Boole and her career as a novelist is what got me interested in the Voyniches in the first place, but then I found so much interesting stuff that I decided to write a series of posts on them. I'm planning on digging more into Ethel's history in a second post in the series.
Edit: something else I just found digging around is that there's a book called "The Booles and the Hintons" (https://www.amazon.com/Booles-Hintons-Dynasties-Helped-Moder...) about the entanglement between the two families through marriage and work. One result of the "Boole-Hinton dynasty" turns out to be Geoffrey Hinton.
This aspect of her life also seems pretty colorful! https://en.wikipedia.org/wiki/Ethel_Voynich#Alleged_affair_w...
Edit: something else I just found digging around is that there's a book called "The Booles and the Hintons" (https://www.amazon.com/Booles-Hintons-Dynasties-Helped-Moder...) about the entanglement between the two families through marriage and work. One result of the "Boole-Hinton dynasty" turns out to be Geoffrey Hinton.