Said to have had this son, but please note the birthplace:
.  Calvin Callaway KITTS, b. 2 Jun 1839, Grainger Co., TN; d. 18 Aug 1938, Knoxville, Knox Co., TN
Note also that his birth would have been to close to Margaret's.

1.  Jordan R. Dodd, ed.  1993.  KY, NC, TN, VA, WV Marriages:  Early to 1850.  Liahona Research, Orem, UT (Broderbund CD-229):

Kitts, Andrew

Leedy, Polly

May 24, 1825

Wythe Co., VA

2.  1830 U.S. Census Index/Images (online at Ancestry.com, Image #56 of 109; official enumeration date 1 Jun 1830; extracted by Diana Gale Matthiesen):

1830

VA

Wythe Co.

Roll M19_200

p. 340

Ln. 6

Andrew Kitts

110 010 - 200 010

no slaves

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
1 male	4 or under	1825-1830	= Harvey (b. 1829/30)
1 male	5-9	1820-1825	= Son A
1 male	20-29	1800-1810	= Andrew (b. 1794/5)
2 females	4 or under	1825-1830	= Daughter B = Daughter A
1 female	20-29	1800-1810	= Polly (b. 1809/10)

3.  1840 U.S. Census Index/Images (online at Ancestry.com, Image #51 of 90, indexed "Andrew Hills"; enumerator only sporadically indicated occupation; official enumeration began 1 Jun 1840; extracted by Diana Gale Matthiesen):

1840

VA

Wythe Co.

pp. 98B-99A

Ln. 2

Andrew Kitts

132 000 100 - 211 101

_______

no slaves

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
1 male	4 or under	1835-1840	= Joseph (b. 1840/1) or = Calvin (b. 1839)
3 males	5-9	1830-1835	= Jacob (b. 1836/7) = David (b. 1834/5) = Washington (b. 1830/1)
2 males	10-14	1825-1830	= Harvey (b. 1829/30) = Son A
1 male	40-49	1790-1800	= Andrew (b. 1794/5)
2 females	4 or under	1835-1840	= Margaret (b. 1838/9)
1 female	5-9	1830-1835	= Ann (b. 1832/3)
1 female	10-14	1825-1830	= Daughter A or B
1 female	15-19	1820-1825	= ?
1 female	30-39	1800-1810	= Polly (b. 1809/10)

4.  1850 U.S. Census Every-Name-Index/Images (online at Ancestry.com, Image #228-229 of 238):  68th Dist., Wythe Co., VA, Roll M432_982, pp. 337B-338A, 1588/1588, enumerated 4 Oct 1850, official enumeration date 1 Jun 1850 (extracted by Diana Gale Matthiesen):

Andrew Kitts	55	M		Farmer		Va
Polly    "	40	F				"
Harvey    "	20	M				"
Washington "	19	M		Labourer		"
Ann        "	17	F				"
David      "	15	M				"
Jacob      "	13	M				"
[next page]
Margaret Kitz	11	F				Va
Joseph    "	9	M				"
Jane      "	7	F				"
Jackson   "	5	M				"
Nancy     "	3	F				"

5.  1860 U.S. Census Every-Name-Index/Images (online at Ancestry.com, Image #115 of 223):  68th Dist., Wythe Co., VA, Roll M653_1385, p. B, PN 142, 1075/952, enumerated 7 Jul 1860, official enumeration date 1 Jun 1860 (extracted by Diana Gale Matthiesen):

Andrew Kitts	65	M		Laborer			Virginia
Polly    "	55	F					do
Jacob    "	23	M		Laborer			do
Caroline "	20	F		None			do
Joseph   "	19	M		"			do
Jane     "	15	F					do
Jackson  "	12	M					do
Nancy    "	11	F					do
Frances  "	10	F					do
Washington Kitts	26	M		Laborer		125	do
Archney      "	8	F					do
Floyd        "	6	M					do
Ballard      "	3	M					do

Polly is too old to have birthed the three youngest children, and the way they are listed suggests they are Washington's children (i.e., that he is a widower).

6.  1870 U.S. Census Every-Name-Index/Images (online at Ancestry.com, Image #8 of 21):  Bland C.H. [Court House] P.O., Seddon Twp., Bland Co., VA, Roll M593_1636, p. 410B, PN 8, enumerated 15 Jul 1870, 51/51, official enumeration date 1 Jun 1870 (extracted by Diana Gale Matthiesen):

Kitts Polly	60	F	W	Keeping house			Va
_____ Jackson	22	M	"	Farm Laborer			"
_____ Nancy	19	F	"	Without Occupation			"
_____ Fanny	17	"	"	"        "			"

We're uncertain of Polly's age, but Nancy and Fanny appear to have shaved two or three years off their ages.

.  Public Member Trees (online at Ancestry.com).