hi! i.m carole heizer cooke and my family lives in Prairie du Rocher, Il. They've been there since 1746 and are all descended from William (Guillame) Hyzer and Marguerite Grivel. Supposedly, they came from France in 1741 but no one can trace them back before this time. If this is of help to you, I can put you in touch with more knowledgable than I. Hopes this helps.