Do you know where in Bavaria they came from? My gggg-grandmother Regina GUNDELFINGER Gugenheimer came to Regensberg, Bavaria from the Krumbach-Huerben area of Swabia. According to the Regensburg records she was born February 20, 1784 in Kleinnordlingen, she died December 25, 1858 London, England
This family was Jewish.See this page on my website which includes a photo of her portrait:
http://www.kittymunson.com/Thannhauser/3.html