I have extensive information on Abraham's descendants and would be willing to share this with you. I have a question, how were you able to ascertain that Daniel and Abraham were brothers? I also think this is correct, but have not been able to prove it with any primary evidence. I think that Samuel was also a brother.
You also said that Johan was Daniel's father? I have a Joseph listed on the 1870 federal census living with Daniel and identified as Daniel's father. I also obtained a copy of Joseph's obituary from 1872 in the Evangelical Messenger that gives his date of birth as October 1779. If this is the same Joseph that is listed in the baptismal records of the Swoben Creek Himmel Lutheran & Reformed Church of Northumberland County, then he was the son of Casper Kobel and his wife, Catherina. Casper Johann Kobel was identified on various census records as Casper Kauble. He had several wives and numerous children. He had two children by Catherina, Joseph and an older son by the name of Johan Frederich who apparently went mostly by Frederich. Joseph is an enigma as I can't find him on any census between 1820 and 1870. Both Abraham and Daniel named one of their sons Joseph.
I have a copy of a land warrant for 320 acres of land sold to Elizabeth Kauble in May 1832 in Pleasant Twp. of Marion County, Ohio. On the same day, she in turn sold 80 acres each to Daniel and Abraham Kauble for $100 each. On the 1850 census, Elizabeth Kauble is living next door to Abraham, who goes by Abram. He is listed on the census as Abram Coble. Daniel and his wife, Elizabeth Hain, is listed on the previous page of the census. I found a record where Daniel later sells his land to Samuel Kauble and then moves to Clay County in Indiana.
I would be most interested in exchanging information with you on these two and possibly three brothers as I haven't figure out for sure their relationship with Samuel. I do know that Abraham's youngest daughter, Maria, marries Samuel's son, David, later in life after she is widowed. It is possible that they were first cousins.