My third great-grandmother was Marie Anne Gury, born April 1818 in Francaltroff, Moselle, France. After marrying Nicolas Schmitt, Marie moved to Hellimer and had 10 children before immigrating to the United States in the early to mid 1850s. The family settled in Cincinnati.
Another Gury descendant shared a photograph of a woman who may have been Marie's sister Christina. There are women named Christina in nearly every generation of the Gury family, so the possibility of a connection is strong. The Christina in question was the Mother Superior in a convent in France. This makes me cautiously optimistic; there may be some interesting records available.