I noticed your message as I was checking this forum of the genealogy.com website.I too am trying to find the relations to my Ruoff relation.You are not alone, as I found a Becki Blair who posted her message a couple of years ago on the Immigration forum of the genealogy.com website.
Here is what I have so far been able to find from help by others on the different forums of this website.
My relation is Amelia Ruoff born November 6, 1858 at Wasseralfingen, Wurtemburg, Germany. Amelia Ruoff somehow met a man named Emil Kettler, Sr. born December 24, 1847 at Oldenburg, Germany. Amelia Ruoff and Emil Kettler, Sr. married March 4, 1881 in Los Angeles County, California. They had nine children. Amelia Ruoff Kettler died July 29, 1935 in Los Angeles, County California. Her husband Emil Kettler, Sr. died January 17, 1932 in Los Angeles County, California.
Another person from one of the other forums on this website informed me that Amelia Ruoff's hometown of Wasseralfingen was absorbed by the larger nearby city of Aalen, Wurtemburg, Germany in 1975.She also indicated that the LDS Mormon family records has information about the town of Wasseralfingen, Wurtemburg, Germany.
I was told by someone in the family that Amelia Ruoff had family that also lived in California, they were called the Ruoff Cousins by the children of Emil and Amelia Ruoff Kettler. When I asked for more information or details about them, the relatives were unable to provide any further information about her parents, siblings, or other relatives.I have been unable to connect her to any other Ruoff's. No one in the family has said anything about Ruoff's living in other states.This does not mean that our trees might not be connected, as I have found that some families moved in family groups and left other individuals behind in other states (some of which are forgotten to be mentioned in family records).
I hope that this is helpful, and hopefully you are still researching your family tree. I have had some help by posting the same or similar messages on different forums within the genealogy.com website, as I have noticed that different people read and follow different forums. Best wishes, and hoping to hear from you soon.