Here's some sauce on J K Rowling:

https://www.nickiswift.com/11748/celebs-think-secretly-part-illuminati/

https://www.mugglenet.com/2020/05/solve-et-coagula-part-1-rowlings-alchemical-tattoo/

"Solve Et Coagula is also seen on images of Baphomet, on the arms. Solve is on Baphomet's right arm with a hand pointing up at a crescent sun, and Et Coagula is on Baphomet's left arm with a hand point down towards the moon. The most popular, widely available, and frequently cited image of Baphomet, was created by French occultist, alchemist, and political socialist Éliphas Lévi Zahed (Alphonse Louis Constant), whose name is also visible on the image of Baphomet."

https://miriadic.fandom.com/wiki/Solve_et_coagula

https://www.digitalspy.com/movies/a841654/secret-inspiration-harry-potter-deathly-hallows-symbol/

Here's some sauce on J K Rowling:

https://www.nickiswift.com/11748/celebs-think-secretly-part-illuminati/

https://www.mugglenet.com/2020/05/solve-et-coagula-part-1-rowlings-alchemical-tattoo/

https://www.digitalspy.com/movies/a841654/secret-inspiration-harry-potter-deathly-hallows-symbol/