Some say:
Father:  William CRAWFORD
Mother:  Sarah __?__

Others say:
Father:  James CRAWFORD
Mother:  Elizabeth ROBERTSON

Note the ten-year gap here, which often signals that one wife has died and the husband has remarried. 

If Elizabeth's birthyear is correct, she cannot be a child of Jane CRAWFORD.
10.  Elizabeth "Betsy" CORBIN, b. 1786; m. 1808
So, is her birthyear wrong and she had a late first marriage?  Or did Ambrose have a second wife?

1.  Jordan R. Dodd, ed.  1993.  Virginia Marriages:  Early to 1850.  Liahona Research, Orem, UT (Broderbund CD-229):  not found.

2.  Kenneth Corbin.  2009.  The Leaves of the Corbin Tree.  2 vols.  Self-published, Louisville, KY:

The author did not routinely put surnames in all-caps, so I have converted them to make for easier scanning for names.
p. 7	24.  Ambrose6 CORBIN (Rawley5 [CORBIN], Elizbeth4 SMITH, Grace3 BALLARD, Anne2…, William1 [THOMAS])26 was born circa 1723 at Spotsylvania Co., VA.5  He married Jean CRAWFORD, daughter of William CRAWFORD and Sarah, circa 1757.  He died before 19 Dec 1808 at Pittsylvania Co., VA... [There is a long paragraph of tax, land, and court documents, including…] He was appointed as guardian of Jamerson CORBIN, Thompson CORBIN and Mary CORBIN, children of his deceased son William CORBIN, recorded in Court Order Book# 10 Page# 34 on 15 Jul 1801 at Pittsylvania Co., VA.27...  He left a will on 3 Aug 1807 written in at Pittsylvania Co., VA; lists wife Jinny-Janny, Daughters: Molly, Sally and Betsy, a slave Dinah and the words "All my Children", executor: son David CORBIN...27 Jean CRAWFORD was born circa 1732 at Orange Co., VA.  She died after 9 Mar 1821 at Pittsylvania Co., VA.  She was also known as Jane.  She lived in 1749 at Culpeper Co., VA. The 10 known children of Ambrose6 CORBIN and Jean CRAWFORD were as follows:   + 55.   i.   John7 CORBIN was born between 1758 and 1763.  He married Miss No Name.  + 56.   ii.   William CORBIN was born between 1759 and 1764 at VA.  He married Susanna DAVIS, daughter of William DAVIS and Sarah, on 19 Feb 1787 at Pittsylvania Co., VA.   57.   iii.   David CORBIN was born circa 1762.  He died before 5 Aug 1836 at Pittsylvania Co., VA...  He may not have married...
p. 8	[Long paragraph of records for David.  Mentions specifically brothers David and Thomas; Louisa CORBIN, daughter of brother, Thomas; nieces Paulina and Sally MYERS.] + 58   iv.   Joshua CORBIN was born before 1765 at VA.  He married Edith Wilson VADEN, daughter of Burwell VADEN and Sarah WILSON, on 29 Nov 1798 at Pittsylvania Co., VA. + 59   v.   Thomas CORBIN Sr. was born before 1766 at Pittsylvania Co., VA.  He married Mary.   60   vi.   Sally CORBIN was born circa 1769 at VA.  She died before Jun 1821 at Pittsylvania Co., VA...   61   vii.   Randolph CORBIN26 was born circa 1770 at VA.  He died before 16 Sep 1822 at Pittsylvania Co., VA...  He may not have married...  He left a will on 1 Sep 1822 at Pittsylvnia Co., VA recorded in Will Book# 1 Page# 33-34.  States my Brothers David, Thomas, and Louisa CORBIN daughter of my brother, Thomas and my neices (sic) Paulina and Sally MYERS. Also Bejamnin (sic) MYERS sons: Hartwell, William and Christopher. Singleton CORBIN signed as a witness to the will.27 + 62   viii.   Nancy Ann CORBIN was born circa 1773 at VA.  She married William MYERS, son of George MYERS III and Mary DAIVS, on 14 Apr 1791 at Pittsylvania Co., VA. + 63   ix.   Molly CORBIN was born circa 1776 at VA.  She married Royall KING on 16 Feb 1799 at Pittsylvania Co., VA. + 64   x.   Elizabeth CORBIN was born circa 1786 at Pittsylvnia Co., VA.  She married Benjamin MYERS, son of George MYERS III and Mary DAVIS on 2 Nov 1808 at Pittsylvania Co., VA.
p. 761	Endnotes... 5.  A.M. Prichard, Allied Families of Read, Corbin, Luttrell & Bywaters (Staunton, VA: The McClure Co., Inc., 1930)...
p. 762	26.  County Clerk, Court House, Chatham, Pittsylvania Co. VA... 27.  Randolph CORBIN Will (1 September 1822), Pittsylvania Co., VA Wills...
Janny/Jenny/Janie/Jinny/Ginny/Gincy/Jincy are all nicknames of Jane.

3.  Family Group Sheet from CORBIN Y-DNA Surname Project member.

4.  LDS.  Family Search: Internet Genealogy Service (online at FamilySearch.org):  The Ancestral File, Pedigree Resource Files, and IGI are chock full of patron submissions on Ambrose, none of which appear to be based on factual evidence, except the ones that mistakenly give the date his will was proved as the date of his death.

5.  WorldConnect / Ancestry World Trees (online at RootsWeb.com/Ancestry.com).