Her given name was Elżbieta, but she is also known as Izabela. Unfortunately, her mother was also Izabela Potocka who married Stanisław Lubomirski (her Subalbum is here). A genealogical sketch of Elżbieta Lubomirska who married Polish patriot Ignacy Potocki, this Izabela Potocka, is here.
From 18thcenturyblog.com.