Judith Jans Leyster was a Dutch Golden Age painter. She painted genre works, portraits and still lifes. Although her work was highly regarded by her contemporaries, Leyster and her work became almost forgotten after her death. Her entire oeuvre was attributed to Frans Hals or to her husband, Jan Miense Molenaer, until 1893. It wasn't until the late 19th century that she was recognized for her artistic abilities.
A bit more: https://artvee.com/artist/judith-leyster/
Totally reminds me of Kate from Upstart Crow.
I see it, yep
She has a scene or two in the show where she is a bit of a self-portrait painter, as well.