Isabell is said to be George's daughter with Nancy, but she is not with George in the 1860 census and, for that matter, neither is Nancy.  George's wife in the 1860 census is Betsy.

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

Stroup, George

Lanter, Bezy

5 May 1825

Wythe Co., VA

2.  1830 Census Index/Images (online at Ancestry.com, Image #91-92 of 110; extracted by Diana Gale Matthiesen):¤•

1830

VA

Wythe Co.

Roll M19_200

pp. 356B-357A

Ln. 24

George Stroup

000 010 000 - 200 010 000 100

no slaves

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
1 male	20-29	1800-1810	= George (b. 1800)
2 females	4 or under	1825-1830	= Saphronia (b. 1827/8) = Sophia (b. 1825/6)
1 female	20-29	1800-1810	= Elizabeth (b. 1800)
1 female	70-79	1750-1760	= grandmother?

3.  1840 Census Index/Images (online at Ancestry.com, Image #9 of 84; extracted by Diana Gale Matthiesen):¤•

1840

VA

Wythe Co.

Roll 579

pp. 80B-81A

Ln. 21

George Stroup

200 000 100 100 - 011 100 110

no slaves

0100000

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
2 males	4 or under	1835-1840	= Solomon (b. 1836/7) = John (b. 1835)
1 male	40-49	1790-1800	= George (b. 1800)
1 male	70-79	1760-1770	= Peter? (b. 1760-65)
1 female	5-9	1830-1835	= Daughter B
1 female	10-14	1825-1830	= Saphronia (b. 1827/8)
1 female	15-19	1820-1825	= Sophia (b. 1825/6)
1 female	40-49	1790-1800	= Elizabeth? (b. 1800)
1 female	50-59	1780-1790	= ?
1	person employed in agriculture

Is the elderly man George's father?  I can't find him elsewhere.  The woman in her 50's is too young to be George's mother.  Listed five lines above George's brother, Jacob STROUP.

4a.  1850 Census Every-Name-Index/Images (online at Ancestry.com; Image #192 of 235):  District 68, Wythe Co., VA, Roll M432_982, p. 319B, 1321/1321, enumerated 20 Sep 1850, official enumeration date 1 Jun 1850 (extracted by Diana Gale Matthiesen):¤•

George Stroupe	50	M		none		Va
Sephrona   "	22	F				"
John       "	15	M		none		"
David      "	8	M				"
Solomon    "	13	M				"
Mary       "	4	F				"
James      "	5/12	M				"
Nancy Pruet	33	F				"

Was the ordering of the children a mistake?  Or does it signify that some of the children are not our subject's?  John appears to have been enumerated twice (see next source), or is the other one a different John?  Listed nexted to George's sister, Margaret STROUPE, who is next to George's mother, Mary (WENRICH) STROUPE.

4b.  1850 Census Every-Name-Index/Images (online at Ancestry.com, Image #174 of 235):  Sixth-Eighth Dist., Wythe Co., VA, Roll M432_982, p. 310B, 1200/1200, enumerated 6 Sep 1850, official enumeration date 1 Jun 1850 (extracted by Diana Gale Matthiesen):¤-

John Stroupe

14

M

Va

John and three other young laborers are living with the John & Mary (SMITH) McGLOTHLIN family. 

4c.  1850 Census Every-Name-Index/Images (online at Ancestry.com, Image #6 of 235):  Sixty-Eighth Dist., Wythe Co., VA, Roll M432_982, p. 226B, 32/32, enumerated 15 Jul 1850, official enumeration date 1 Jun 1850 (extracted by Diana Gale Matthiesen):¤-

Julia Ann Venerick	70	F				Virginia
David Stroupe	10	M				"

Julia Ann is our subject's aunt — sister of his mother, Maria Magdalene (WENRICH) STROUP, and sister of his mother-in-law, Elizabeth (WENRICH) LANTER.

5.  1860 Census Every-Name-Index/Images (online at Ancestry.com, Image #219 of 223):  Wytheville P.O., District 68, Wythe Co., VA, Roll M653_1385, p. 976, PN 254, 1970/1569, enumerated 7 Aug 1860, official enumeration date 1 Jun 1860 (extracted by Diana Gale Matthiesen):¤•

George Stroup	60	M		Laborer		100	Virginia
Betsey	48	F					do
David	20	M		Laborer			do

Betsey is too old to be George's daughter, but too young to be his first wife, who has, in any case, already remarried.

6.  1870 Census Every-Name-Index/Images (online at Ancestry.com, Image #33 of 88):  Wythevill P.O., Blacklick Twp., Wythe Co., VA, Roll M593_1682, p. 393A, PN 33, 238/237, enumerated 27 Jun 1870, official enumeration date 1 Jun 1870 (extracted by Diana Gale Matthiesen):¤•

Stroup George	70	M	W	Day laborer			Virginia
"   Nancy	66	F	W	Keeping house			"
"   David	27	M	W				"
"   Isabella	17	F	W				"
"   William	4	M	W				"
Trainer Elizabeth	38	F	W	Keeping house			"
"    Susan	19	F	W	"      "			"
Hoback William	25	M	W	Day laborer			"

Isabella is showing every sign of being Nancy's child from a prior marriage, which makes Isabella his stepdaughter, not his daughter.  Nancy is too old to be William STROUP's mother, so who is he?  Could Elizabeth be George's "Daughter B," born between 1830 and 1835?

7.  1880 Census Every-Name-Index/Images (online at Ancestry.com, Image #4 of 42):  Wythe Co., VA, Roll T9-1395, p. 479D, PN 4, SD 5, ED 111, enumerated 2/3 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

11

13

22

23

24

25

26

30

30

Stroup George

W

M

80

/

Laborer

/

/

Virginia

Penn

Va

______ Nancy

W

F

69

Wife

/

Keeping House

/

/

Virginia

Va

Va

30

30

Phipps Gran.

W

M

34

Son in Law

/

Laborer

/

/

Virginia

Va

Va

"    Mary

W

F

34

Wife

/

Keeping House

/

/

Virginia

Va

Va

"    Wm H

W

M

13

Son

/

/

/

Virginia

Va

Va

"    James H

W

M

6

Son

/

Virginia

Va

Va

"    Granville

W

M

4

Son

/

Virginia

Va

Va

"    Maria

W

F

3

Dau

/

Virginia

Va

Va

Nancy is lined out, and "died" is written in the margin, so presumably she had only just died.  Listed one household below James Henry & Isabella (STROUP) GRUBB.

8.  1890 Census:  the 1890 Census Population Schedules were destroyed. 

9.  Message posted to the Trainer Family Genealogy Forum (online at GenForum.com).

10.  Message posted to the TRAINER Surname Board (online at RootsWeb.com/Ancestry.com).