Not a name most of the Lesson will know but she was a giant of the Folk Revival, someone who's been very influential to me personally as well as thousands of others and is basically responsible for rescuing the lap dulcimer from being even more obscure than it is today.
My favorite tune from her might be Hangman, aka The Maid Freed from the Gallows, aka Gallows Pole as recorded by Leadbelly and popularized later by Led Zeppelin: https://www.youtube.com/watch?v=48bX-hBjVn4