The information I have mostly agrees with what you are showing.I show that William Abercrombie was born about 1865 in Laurens Co., S.C. and died between 1850 & 1860 probably in Fayette Co., GA.Also show that his 1st wife Sarea Aracey Picard was born about 1772 and died before 1819, possibly as early as 1816 or 1817.If her death date range is correct, then William Abercrombie was married to his 2nd wife Mary Adams by at least 1818 which makes Sarah Aracey Abercrombie, b. 12 June 1819 a daughter of William & 2nd wife Mary (Adams) Abercrombie.Also a son Henry David Abercrombie, b. 1820.He is said to have married 20 Dec. 1839 in Fayette Co., GA. to Lucinda Wells and died in the Civil War "Co. F. 22nd AL. Infantry. I've not been able to locate a grave marker in Chambers Co., AL. for James B. Abercrombie, b. about 1807 in Laurens Co., S.C.Census enumerations show that he was a Blacksmith, Grocer and Merchant.Circumstantial evidence points to his 1st marriage before 1833 in Campbell Co., GA. and that his 1st wife was Sarah A? Thomason, b. about 1810 and died 1865.Have a note that James B. Abercrombie was 2nd married to a lady named Martha. Could not find a marriage record in Chambers Co., AL. for Pleasant W. Abercrombie and wife Irena Hughey, but think they married about 1860.Did find a record of marriage in Chambers Co., AL. for Thomas J. Abercrombie and wife Mary E. Lett.Ref: Bk. 5, pg. 581bTheir date of marriage was 7 Jan. 1860 and was performed by H. Gilmer, M.G.
Note: The 1850 census for Chambers Co., AL. shows James B. Abercrombie and family under the name of James Crumby.
About the only other thing I can add to your data is that James M. Abercrombie married Lucretia Hughey 22 June 1871.I am unable to find that marriage record in Chambers Co., AL. Oh, I also show that Fayette Co., GA. was the place of birth of all the children, except Caroline, who was born in Chambers Co., AL.