Jacob Dobkins was born 29 Dec 1811 in TN (probably Claiborne Co.). He married Rachel B. Karns on 9 Feb 1832 in Lee Co., VA. All of their known children were apparently born in Claiborne Co., TN.: Mary E.(1833- ? ) Anna(1835-1911?) m. Jonathan Edmisten, 1854-TX James C. (1837- ? ) m. Rebecca Hahn, 1859-TX John W.(1839-1908) m. Susan Benton, 1865-TX Lazarus(1843- ? ) m. Catherine, then Hester Woolsey Rachel(1847- ? )
Jacob & Rachel's family were on the 1840 & 1850 Census of Claiborne Co., TN. Rachel died 20 May 1860, but Jacob was on the 1860 & 1870 Census of Gainesville, TX. Jacob died 7 Jun 1870. Jacob & Rachel were buried a short distance southeast of the Office of the Fairview Cemetery in eastern Gainsville, TX.
Jacob's 1870 Census record is confusing, since it was dated 24 Oct 1870 (after his death). However, household residents as of 1 Jun 1870 were supposed to be listed in that Census, so it's technically correct. There was one child in his household (Martha A. Dobkins, born 1860/61 in TX.) "Relationship-to-Head" was not specified on the 1870 Census, so it's uncertain from that record if Martha A. was actually a final daughter of Jacob & Rachel Dobkins.
Rachel (Karns) Dobkins was born 1 Oct 1808 in Bedford Co., VA. She was a daughter of Michael (Jr.) and Mary (Bales) Karns. Her family moved about 1825 to southwest Lee Co., VA., where some of her mother's family was engaged in the Bales Iron business. Michael & Mary Karns made a Lee Co. Deed (Bk.12-p.208) on 27 Aug 1831 which stated their intention to move. They gave personal property to their 3 oldest daughters: Geals, Rachel, and Leah Karns. The actual time of the Karns family move is unknown, although it's believed they spent some time with many of Michael's siblings in Russell Co., KY. before the majority of the family appeared in Buchanan Co., MO. by 1837. Geals Karns soon moved there too. Leah Karns married Joseph Speak on 13 Sep 1832 in Lee Co., and she remained there until he died shortly after 1850 (Thence moving to Doniphan Co., KS.). Joseph's father was Rev. Nicholas Speak, and he was the minister of record for Leah's marriage as well as the marriage of Rachel to Jacob Dobkins. The "Speak's Chapel" is located on Speak's branch of Martin's Creek and slightly north of the Claiborne Co., TN. border.
In another GenForum posting on Alexander Dobkins, I mentioned finding proof that he moved to Buchanan Co., MO. by 1844, and settled near the parents of Rachel (Karns) Dobkins. Alexander's move nearly halfway across America, and settling near the parents of Jacob's wife indicates the good possibility that Alexander and Jacob Dobkins were brothers. Also, they both moved to two different counties north of Fort Worth, TX. before 1860. I've not yet found any record that Jacob & Rachel Dobkins were ever in Buchanan Co., MO. But it's possible that they moved there briefly after 1850 (without buying any land), and then moved on to Cooke Co., TX. There was definitely some contact with the Karns family of Buchanan Co., MO., since the death date of Rachel (Karns) Dobkins was accurately recorded in her parent's Bible.