Secondary sources give Isabella these parents:
Father may be:  Napoleon Bonaparte CORBIN
Mother may be:  Emeline S. STEED
But the evidence for the connection is not conclusive.

— born in Augusta, Richmond Co., GA:
4.  William Corbin "Willie" POLLARD, b. 20 Dec 1874 or 1876/7; d. 1 Apr 1950
5.  Anna Catharine "Annie / Kate" POLLARD, b. 17 Jan 1879

1a.  LDS.  Family Search: Internet Genealogy Service: IGI - International Genealogical Index (online at FamilySearch.org).

William J. POLLARD Spouse: Isabella C. CORBIN Marriage: 27 Dec 1860, Taylor, Georgia Source: Marriages, 1852-1910. Georgia. Court of Ordinary (Taylor County)

1b.  D.L. Murray & N.R. Murray.  1995.  Marriage Index: AL, GA, SC, 1641-1944.  Salt Lake City, UT (Broderbund CD-3):

Pollard, Wm J

Corbin, Isabella C

nd

Marr. & Death Notices, So. Christian Advoc. (1797-1965)

1c.  WorldConnect / Ancestry World Trees (online at RootsWeb.com/Ancestry.com).  Including a Post-em there by Gerry Hill:

Marriages & Obits Macon Messenger 1818-1865  Jan. 11 1861 pg. 519 Married Taylor Co. 27th Mr. Wm. J. Plllard (sic) of Augusta to Miss Isabella C. Corbin

2.  1850 Census Every-Name-Index/Images (online at Ancestry.com):  William POLLARD (æ 18, b. GA) is living in Jackson Co., GA (p. 51B), with his maternal grandfather, William H. BACON (æ 83, b., SC), and his unmarried aunt, Frances BACON (æ 36, b. GA).  Can't find Isabella.

3.  1860 Census Every-Name-Index/Images (online at Ancestry.com):  Can't find William, unless he's the William POLLARD (æ 28, b. GA) living in Cherokee Co., AL (p. 69), with wife or sister, Mourning E. POLLARD (æ 33, b. GA).  Can't find Isabella.

4.  1870 Census Every-Name-Index/Images (online at Ancestry.com, Image #187 of 389):  Augusta P.O., City of Augusta (Ward 2), Richmond Co., GA, Roll M593_172, p. 94B, PN 80, 668/709, enumerated 2 Sep 1870, official enumeration date 1 Jun 1870 (extracted by Diana Gale Matthiesen):¤•

Pollard William	38	M	W	Ret Grocer	8000	1000	Ga
_______ Bell	28	F	W	Keeps House			"
_______ Mary L	6	F	W				"
_______ Fanny	3	F	W				"
_______ Bell	5/12	F	W				"	Jan
Bacon Fanny	56	F	W	At Home			"
Williamson Mary	14	F	W	At Home			"

Fanny is William's aunt.

5.  1880 Census Every-Name-Index/Images (online at Ancestry.com, Image #70 of 87):  1028 McIntosh St., Augusta, Richmond Co., GA, Roll T9_163, p. 320B, PN 10, SD 2, ED 98, enumerated 14 Jun 1880, official enumeration date 1 Jun 1880 (extracted by Diana Gale Matthiesen):¤•

1880:  for an explanation of the column headings, please see What the Numbers in the Federal Census Mean (missing columns contained no data).

1

2

3

4

5

6

8

9

10

13

21

24

25

26

*

1028

550

818

Pollard W J

W

M

48

Father

/

Cotton Broker

Ga

SC

Ga

"    Isabella

W

F

38

Wife

/

Keeps House

"

Ga

"

"    Loula

W

F

15

Dau

At Home

/

"

"

"

"    Fanny

W

F

13

"

"   "

/

"

"

"

"    Belle

W

F

9

"

At School

/

"

"

"

"    Willie

W

M

3

Son

"

"

"

"    Kate

W

F

1

Dau

"

"

"

Lowdnes Sophia

W

F

25

Servant

/

Goveness

SC

SC

SC

*McIntosh St

6.  1890 Census:  the 1890 Census Population Schedules were destroyed.

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

8.  Notes from Charles Carver CORBIN.