I kid you not. Her name was Princess Alice of Battenberg and she was the mother of Prince Phillip, the husband the current Queen Elizabeth. She also had a breakdown at one point in her life and was given the diagnosis of Paranoid Schizophrenia (I have my doubts about that diagnosis). She drifted apart from her family after that and became a nun after that.
The cause of her hearing loss was congenital, which should come as a surprise to no one as the royal family is known for marrying cousins twice removed. But she did a lot with her life. I wonder how she communicated. It doesn’t sound like the family tried to keep her hidden or something like that.
Anyways, if you want to read more about her, go here.