1.  Marriage Record:

2.  John T. Humphrey.  1991-1998.  Pennsylvania Births.  14 vols.  Self-published, Washington, DC (Broderbund Family Archives: Birth Index: Southeastern PA, 1680-1800, CD-196):

Child	John Jacob Stang	Anna Christina Sperr	Maria Magdalena Stang
Event	Baptism	Birth/Baptism	Birth/Baptism
Event Date	8 Feb 1756	Abt Jan 1755	20 Nov 1794
Church	Indian Creek Reformed	Trappe Lutheran	Wentz's Reformed
Township	Franconia	Upper Providence	Worcester
County	Montgomery	Montgomery	Montgomery
State	Pennsylvania	Pennsylvania	Pennsylvania
Father	Philip Stang	Johanna Philip Sperr	Jacob Stang
Mother	Mrs. ??? Stang	Mrs. Dorothea Sperr	Mrs. Christina Stang

3.  Family Data Collection (online at Ancestry.com):

Name:	Jacob Stong	-	-	Benjamin Stong	J Henry Stong
Birth Date:	1756	-	-	28 January 1789	1790
Birth Place:	Montgomery, Wordhester (sic) Twp, PA	-	-	Montgomery, PA	PA
Death Date:	29 November 1819	-	-	1840	1825
Death Place:	Lower Oxford Twp, Chester, PA	-	-	PA	Lower Mahantango, Schuylkill, PA
Father:	Philip Stang	-	-	Jacob Stong	John Stong
Mother:	Barbara	-	-	Christina	Christina
Spouse:	Christina	-	-	-	Elizabeth
Marriage Date:	1780	-	-	-	-
:	-	-	-	-	-
:	-	-	-	-	-

These are patron submissions, so caveat emptor.

4.  1790 Census Index/Images (online at Ancestry.com, Image #13 of 24; extracted by Diana Gale Matthiesen):•

1790

PA

Montgomery Co.

Roll M637_9

p. 24/26/162

Ln. 24

Jacob Stong

1-2-2-0-0

These data indicate:

Gender and Type	Age Class	Therefore Born	Individuals Inferred
1 free white males	16 or over	in or bef. 1774	= Jacob (bap. 1756)
2 free white males	15 or under	1774-1790	= Joseph (b. 1789)
2 free white females	all ages	in or bef. 1790	= Christiana (b. ca. 1760) = Elizabeth (b. ca. 1784)

Listed one line below Henry STONG, who is one line below John STONG.

5.  1800 Census Index/Images (online at Ancestry.com, Image #2 of 3 — list roughly alphabetized; extracted by Diana Gale Matthiesen):•

1800

PA

Montgomery Co.

Lower Salford Twp.

Roll 41

p. 122

Ln. 15

Stong Jacob

20001-00110-00

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
2 males	9 or under	1790-1800	= Son A = Joseph (b. 1789)
1 male	45 or over	in or bef. 1755	= Jacob (bap. 1756)
1 female	16-25	1774-1784	= Elizabeth (b. ca. 1784)
1 female	26-44	1755-1774	= Christiana (b. ca. 1760)

Listed one line below Henry STONG, who is the only other STONG in Lower Salford Twp.

6.  1810 Census Index/Images (online at Ancestry.com):  can't find, and I really looked.

7.  1820 Census Index/Images (online at Ancestry.com, Image #1 of 5; extracted by Diana Gale Matthiesen):

1820

PA

Chester Co.

Lower Oxford Twp.

Roll M33_96

p. 346

Ln. 7

Joseph Stong

100020-10001-1-000

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
1 male	9 or under	1810-1820	= grandson
2 males	26-44	1775-1794	= Son A? (b. 1790-1800) = Joseph (b. 1789)
1 female	9 or under	1810-1820	= granddaughter
1 female	45 or over	in or bef. 1775	= Christiana (b. ca. 1760)
1	foreigner not naturalized

Listed one line below Christina's son-in-law, Samuel LEFEVER (220001-23010-0-000).  Christina has recently been widowed, and she's apparently not living with her daughter, Elizabeth (STONG) LEFEVER, so she is almost certainly the elder woman in son Joseph's household.  The other young man may be Christina's "Son A," who was in her household in the 1800 census.  Joseph appears to be a widower with two small children.  Joseph is the only STANG/STONG in Chester County.

8.  Ellwood Roberts.  1911.  Abstracts of Montgomery Co., PA, Wills & Administrations, 1784-1823.  Genealogical Society of Pennsylvania, Philadelphia, PA (Broderbund CD-209):

The Wills of Chester Co., PA, 1801 - 1825, Will Abstracts...

STONG, JACOB. Lower Oxford. November 29, 1819. Joseph Stong, administrator.

STONG, CHRISTIANNA. Lower Oxford. November 24, 1822. May 5, 1823. To my dau. Elizabeth Lefevour all wearing apparel. To son Joseph Stong all remainder of estate and Exr. Wits: James Wilson, Samuel Garver.

9.  Family Pedigrees: Everton's Computerized Family File. Vols. 2 & 3.  Everton Publ., Inc. (Broderbund CD-13):  Sheets #28912 and 28913, submitted by Roberta Brokaw Gerke and dated 31 Oct 1989.

10.  Messages posted to the Germany: General Board (online at Ancestry.com/RootsWeb.com).