My name is Schalk, but the family name was Jacques when they entered the United States. The name was misunderstood and was written on the entry form with the spelling "Schalk". there are several of the family members (decendents) with names that are different but still related. ex Chalk, Schalk Schalck, Shalk etc.
There is still a part of the family in Hoste, France where they have been for hundreds of years. I visited them about three years ago, and met various members of the family. The family speaks French, some German (due to the German control during the war), and limited English. You will be very proud of your French family.
The name may have been Jewish if you go back to the early part of the millenium, but most of the later records show them in France.
There is a "cousins" reunion held at three year intervals in Hoste, France. I believe the next one is in 2012.