I am looking for records from the Alsace region. I am looking for Weygand ancestors

Antoinette Weygand
Birth 1891 in Rhinau, Alsace, France (early records say Germany)
Death 1968 in Sioux Falls, Minnehaha, South Dakota, USA

Antoin Weygand
Birth 05 Oct 1847 in Rhinau, Alsace, France (Passenger List for Antoinette lists Antoin as father and says they live in Germany)
Death 3 May 1919

married to

Virginia Gouget
Birth 29 Sep 1853 in Rhinau, Alsace, France
Death 20 Jul 1925

Antoin's father is

Michael Weygand
Birth 06 Dec 1811 in Rhinau, Alsace, France
Death unknown
Spouse unknown

and his father is

Laureut Weygand and wife Barbe Heiurtchen

I have no actual documentation of any of these. Just a list that was in a family book. I would like to find documentation or sources that could document that this is true.

I would need English. My grandma taught me to count to five and then she died so that's all I know.

I noticed that her early records say that she is from Germany, but later records say France. Rheinu or Rhinau. I think she spoke French and pretty much claimed to be French. I would love to hear that voice again.