Found this but no documents yet. Seems a likely parent if you take into account the names of the men.
Benjamin Allison was born in 1773 in Wilkes, North Carolina, his father, Posey, was 34. He married Margaret Wood in 1793 in Burke, North Carolina. They had nine children in 21 years. He died in 1850 having lived a long life of 77 years.
https://archive.org/details/cihm_11230
the page below is the index. there's a Sarah Jane Allison. page 190 and 261
https://archive.org/stream/cihm_11230#page/n372/mode/1up
Posey is mentioned by his brother Burch Allison in his (Burch) Rev. War pension application. 1783 Montgomery County, MD tax list has Posey Allison. in the Linganore and Sugar Loaf Hundred area 1838 member of Company E Burke County Volunteers in the North Carolina Volunteers Participating in the Indian Removal, April 7, 1838 Jan. 1828 was a member of a road crew from the fork at Davidsons Quarter to the top of the mountain in the Swanano Gap. North Carolina Secretary of State Land Grant Office Warrants, Surveys and Related Documents, Burke County. FHL microfilm 1,929,073 Henry Allison #2418. Benjamin Allison #2446. Posey Allison #2450.
Charles County, MD court and land records L:20, FHL microfilm 0,013,748. Charles Allanson chose George Thompson as his guardian on 11 Nov. 1684, implying he was at least age 14 and under 21. Charles Co., MD land records L2:21, FHL microfilm 0,013,753. In 1722 Thomas ALLISON, [son of Charles] sold all right in the tract St. John to Francis POSEY. This tract had been owned by his maternal grandfather John POSEY, and the only right Thomas would have had would be by being the only child of his mother, either Mary or Elizabeth, daughters of John POSEY. b) See #14 the inventory of Thomas ALLENSON. The next of kin who approved the inventory were John POSEY and Benjamin POSEY. [cousins, children of his uncle Benjamin POSEY] Charles Allison will, Maryland wills 7:393-394, FHL microfilm 0,012,843 Febry the 2th [sic] 1697/8 Welcome be the Will of God Amen. I Charles Allison in good memory this being my last Will and Testament. I bequeath my soule to god that gave it and my body to the grave. Item I give my Son Thomas all my lands and two Cows & one Stear three years old two yearlings Seven barrows one year old and three Sows, one mare, and yearling Colt one Iron Pott Pewter dish, one Pewter Bason. Item I leave and give my Son Thomas to my father in Law Thomas Asten till he is at the age of Eighteen years and then to be free and for himself but and if he die undr age I leave my lands to my Sister Eliza. her Two Children that She had by Edwd Ford to be Equally divided between them. Item I leave Thomas Asten my whole and full Exr to possess and admenester and keep all my lands and moveables till my Son Thomas is Eighteen years old and then to pay and Deliver unto him all my lands Chattles & Goods Specified in this my last Will and Testamt as witness my hand Febr the 20th 1698. his mark Testes his mark Charles A Allison Edwd E Ams John Stewart On the back of the foregoing will was thus Endorsed 1 day of April 1698 Then Came before me John Stewart the only surviving witnesss to the wthin Last Will and Testamt of Charles Allison desd and proved the same in due mannr and forme according to Law. Ri Boughton Depty Comry
