Based on where their parents were living, I'd have pegged both girls to have been born in TN.

1.  Marriage Record:

2.  1850 Census Every-Name-Index/Images (online at Ancestry.com):  John STROUPE (æ 15, b. VA) is living in Wythe Co., VA, with his widowed father, George STROUPE, plus siblings (q.v.).

3.  1860 Census Every-Name-Index/Images (online at Ancestry.com, Image #6 of 21):  Lyons Store P.O., District No. 7, Hawkins Co., TN, Roll M653_1255, p. , PN 115, 809/756, enumerated 12 Jul 1860, official enumeration date 1 Jun 1860 (extracted by Diana Gale Matthiesen):¤•

Andrew Strop	31	M		Farm Laborer		30	Virginia
Sophia    "	33	F					"
Elizabeth "	12	F					"
George W  "	8	M					"
William   "	6	M					"
Charles   "	4	M					"
Jane      "	2	F					"
Geo W     "	23	M		Farm Laborer			"
John      "	26	M		Do			"
Nancy     "	28	F					"

Sophia (STROUP) STROUP is our subject's sister.  Andrew STROUP and George W. STROUP are their first cousins.

4.  1870 Census Every-Name-Index/Images (online at Ancestry.com, Image #24 of 27):  New Canton P.O., District No. 7, Hawkins Co., TN, Roll M593_1536, p. 82B, PN 24, 162/162, enumerated 11 Aug 1870, official enumeration date 1 Jun 1870 (extracted by Diana Gale Matthiesen):¤•

Stroup John	36	M	W	Working on Farm			Virginia
______ Nancy	38	F	W	Keeping House			Virginia
______ Elmira J	6	F	W				Virginia

Listed next to John's first cousin, Joel STROUP, brother of Andrew and George W. STROUP.

5.  1880 Census Every-Name-Index/Images (online at Ancestry.com):  can't find.

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

7.  1900 Census Every-Name-Index/Images (online at Ancestry.com, Image #1 of 31):  Crockett Depot and Royal Oak Voting Pcts., Black Lick Twp., Wythe Co., VA, Roll T623_1732, p. 26A, SN 1, SD 9, ED 133, enumerated 1 Jun 1900, official enumeration date 1 Jun 1900 (extracted by Diana Gale Matthiesen):¤•

1900:  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

7

8

9

10

11

12

13

14

15

19

20

21

22

23

24

25

27

3

3

Stroup John P

Head

W

M

Nov 1835

64

M

44

VA

VA

VA

Day Laborer

2

Y

Y

Y

R

H

______ Nancy

Wife

W

F

May 1832

68

M

44

3

2

VA

VA

VA

Keeping House

N

N

Y

______ Sarah

Dau

W

F

May 1873

27

M

12

0

0

TN

VA

VA

Y

Y

Y

4

Batemen John

Head

W

M

Jan 1860

40

M

14

VA

VA

VA

Day Laborer

4

Y

Y

Y

R

H

_______ Elmira J

Wife

W

F

Oct 1863

36

M

14

4

3

VA

VA

VA

Y

Y

Y

_______ Robert G

Son

W

M

Apr 1887

13

S

VA

VA

VA

Day Laborer

5

1

Y

Y

Y

_______ Missouri

Dau

W

F

Apr 1890

10

S

VA

VA

VA

At School

1

Y

N

Y

_______ Minnie B

Dau

W

F

Jun 1894

5

S

VA

VA

VA

Elmira is our subject's daughter.

8.  1900 Census Every-Name-Index/Images (online at Ancestry.com):  not found.

9.  One World Tree (online at Ancestry.com).

10.  Message posted to the Stroup Family Genealogy Forum (online at GenForum.com).