If Daniel is Tobias's brother, then Tobias's parents are:
Father:  Daniel S. STRAUB
Mother:  Elizabeth HAHN

1.  Marriage Record:

2.  1850 Census Index/Images (online at Ancestry.com; Image #19 of 33):  Perry [now West Perry] Twp., Union [now Snyder] Co., PA, p. 107A, 132/132, enumerated 18 Nov 1850 (extracted by Diana Gale Matthiesen):¤•

Daniel Straub	46	M	Cooper	Penna
Barbara Straub	45	F		Penna
Catharine Straub	14	F		Penna
Sarah Straub	9	F		Penna
Susanah Straub	7	F		Penna
Barbara Straub	1	F		Penna
Tobias Straub	20	M	Labourer	Penna

Daniel's relatonship to Tobias is unknown, but they could be brothers because the youngest son of Daniel's parents was born 1825-30 and his identity is unknown. 

3.  1860 Census Every-Name-Index/Images (online at Ancestry.com, Image #21 of 25):  Richfield P.O., Monroe Twp., Juniata Co., PA, Roll M653_1119, p. 731, PN 201, 1400/1, enumerated 28 Jul 1860, official enumeration date 1 Jun 1860 (extracted by Diana Gale Matthiesen):

Tobias Stroup	28	M		Farmer	1500	500	Penna
Elizabeth Stroup	24	F					"
Adam	5	M					"
George	2	M					"
Cath. Diehl	10	F					"
John Diehl	19	M		F laborer			"

4.  1870

5.  1880 Census: Every-Name-Index/Extraction (online at FamilySearch.org); Every-Name-Index/Images (online at Ancestry.com, Image #21 of 23):  Monroe Twp., Juniata Co., PA, Roll T9-1137, p. 351A, PN 21, SD 7, ED 133, enumerated 15 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

15

21

23

24

25

26

5

5

Stroup Tobias

W

M

49

/

Laborer

Pa

Pa

Pa

______ Lydia

W

F

44

Wife

/

K H

/

Pa

Pa

Pa

______ George

W

M

21

Son

/

Hard Do??

Pa

Pa

Pa

______ Barbara

W

F

14

Dau

work at home

/

Pa

Pa

Pa

______ Jonathen

W

M

11

Son

"       "

/

Pa

Pa

Pa

Deale Catharn

W

F

29

Sister in L

works house work

Pa

Pa

Pa

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

7.  1900 Census Every-Name-Index/Images (online at Ancestry.com, Image #15 of 22):  Monroe Twp., Juniata Co., PA, Roll T623_1417, p. 115A, SN 8, SD 12, ED 121, enumerated 15 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

11

12

13

14

15

19

20

21

22

23

24

25

26

27

28

157

159

Stroup Tobias

Head

W

M

Jun 1831

68

Wd

PA

PA

PA

Farmer

0

Y

Y

Y

O

F

F

116

Hendricks Susan

Dau

W

F

Jun 1863

36

Wd

1

1

PA

PA

PA

House Keeper

0

Y

Y

Y

_________ Rile

GSon

W

M

Nov 1882

17

S

PA

PA

PA

At School

4

Y

Y

Y

Deal Cathrine

Boarder

W

F

Nov 1851

48

S

PA

PA

PA

N

N

N

Listed nine households from Charles H. STROUP.
 

.  George W. Wagenseller.  1904.  Tombstone Inscriptions of Snyder County, Penna.  Wagenseller Publ., Middleburgh, PA (facsimile hard copies available from HigginsonBooks.com; online at the Snyder County PAGenWeb site):

p. 170	PERRY TOWNSHIP... ARBOGAST'S CEMETERY. Located at Zion's Church 5 miles south of Fremont...
p. 175	Stroup, Lydia, w of Tobias, b Dec 23, 1835; d Mar 3, 1897, aged 61 y 2  m 10 d. Stroup, Jonathan, s of Tobias and Lidia, b Jan 25; 1869, d Aug 8, 1896, aged 27 y 6 m 13 d.

.  Archives of the PASnyder-L Mailing List (online at RootsWeb.com).