Parents are not:
Father:  William⁶ CORBIN, illegitimate s/o Samuel RIDGEWAY & Elizabeth⁵ CORBIN
Mother:  Elizabeth SPINKS

1.  Marriage Record:

2.  1790 Census Index/Images (online at Ancestry.com):  the entire 1790 VA census was destroyed.

3.  1800 Census Index/Images (online at Ancestry.com):  the entire 1800 VA census was destroyed.

4.  1810 Census Index/Images (online at Ancestry.com, Image #22 of 93 — list was roughly alphabetized; extracted by Diana Gale Matthiesen):

1810

VA

Culpeper Co.

Roll 68

p. 23/87

Ln. 3

Wm Corbin (son of Davd)

00011-02011-00

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
1 male	26-44	1765-1784	= Son A
1 male	45 or over	by 1765	= William
2 females	10-15	1794-1800	= Daughter C = Daughter B
1 female	26-44	1765-1784	= Daughter A
1 female	45 or over	by 1765	= Wife-2

5.  1820 Census Index/Images (online at Ancestry.com, Image #5 of 25 — list was roughly alphabetized; extracted by Diana Gale Matthiesen):

1820

VA [now WV]

Kanawha Co.

Roll M33_142

p. 83/126

Ln. 14

William Corbin

000001-00110-0-000

no slaves

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
1 male	45 or over	in or bef. 1775	= William
1 female	16-25	1794-1804	= Daughter C = Daughter B
1 female	26-44	1775-1794	= Daughter A

.  Kenneth Corbin.  2009.  The Leaves of the Corbin Tree.  Vol. 1 of 2.  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. 33	113. William7 CORBIN Sr. (William6, Elizabeth5 [CORBIN], Elizabeth4 SMITH, Grace3 BALLARD, Anne2…, William1 [THOMAS]) was born before 1767 at Culpeper Co., VA. He his (sic) wife is unknown.  He lived; Lawrence Co., OH.  He was in the tax records and has three Horses and four Cattle. He is listed as a son of David CORBIN in 1787 at Culpeper Co., VA.24  He appeared on the census 1810 at Culpeper Co., VA; recorded on Roll #M252-68.30 Known children of William7 CORBIN Sr. include these nine:   444.   i.   Catherine8 CORBIN was born before 1811.  She married William ROGERS on 5 Dec 1837 at Page Co., VA. + 445.   ii.   Elliott CORBIN was born in 1812 at Culpeper Co., VA. He married Lucinda EARLS on 7 Nov 1839. + 446.   iii.   William CORBIN Jr. was born in Jan 1813 at VA. He married Margaret.   447.   iv.   No Name CORBIN was born between 1821 and 1825.   448.   v.   No Name CORBIN was born between 1821 and 1825.   449.   vi.   George W. CORBIN was born between 1820 and 1827 at VA.  He married Frances M. LAYNE, daughter of Samuel LAYNE and Joanna. He married Nancy L..   450.   vii.   No Name CORBIN was born between 1826 and 1830.   451.   viii.   No Name CORBIN was born circa 1831.   452.   ix.   No Name CORBIN was born circa 1831. ...
p. 761	Endnotes... 24.  Netti Schreiner-Yantis, compiler, 1787 Census of Virginia (Springfield, VA 22150: Genealogical Books in Print, 1987)...
p. 762	30.  1790-1930 Census Records...
For reasons known only to the author, he makes our subject the son of William6, the illegitimate son of Elizabeth5 CORBIN & Samuel RIDGEWAY.  He then, in the next paragraph, contradicts himself by saying our subject is listed as a son of David CORBIN (Sr.) in 1787.   The fact is he's shown as "son of David" in the 1810 census.  Also, there is nothing in the author's sources to suggest how he attached these children to William, and Elliott is certainly not one.