According to her genealogical sketch, she was Frances Teresa Stuart’s sister and she was Maid of Honor to Queen Catherine of Braganza and Lady of the Bedchamber to Mary of Modena. The Wikipedia article for this stalwart Stuart loyalist is here.
From vestinewsrf.ru/kul_tura/yakob-ferdinand-fut-jacob-ferdinand-voet-1639-1689-1700/.