I don't have any siblings for Elizabeth Aberhard. She was born about 1761 and died about 1825. She married Hans Jacob Yunker about 1783 and they lived in Jagensdorf, Switzerland. Their great great grandson, Rudolph Yunker b. 1850 in Jagensdorf, came to this country in 1883 with their young family. My husband's grandfather was just a wee baby at that time, born in December 1882. They came to Scott, Indiana which is in the northeastern part of the state (LaGrange County).
My information on the Yunker family is pretty much just our direct line. I do know that Rosetta (Rudolph's wife) had a brother (Jacob Leu) who I believe went to the western part of northern Indiana at that time. Whether there were other Yunkers that perhaps were related and went on to Wisconsin is entirely possible.
I found it rather interesting that your name is Mowrey for I also have Mowry's linked to our Kelly line. Do you have any family in the southern Michigan or northern Indiana area?