Who was Maria Churchill?

Her portrait:

Maria_Churchill_front_cropped.jpg - 188Kb

All we know of her is from some notes on the back of her portrait, that her name was used for her eldest granddaughter and then occasionally by that family, the Edwardses, and finally from the notes left behind in my paternal grandfather's hand of the forbears of his wife:
Next: Full view of Maria Churchill's framed miniature    Home