— born in Beaver Co., PA:
  6.  Catharine STIFFLER, b. ca. 1811
  7.  (Daughter A) STIFFLER, b. 1810-20
  8.  Paul STIFFLER, b. 10 Apr 1814 
  9.  Henry STIFFLER, b. ca. 1817
10.  George C. STIFFLER, b. 7 Oct 1819 or 1820/1 {1850: 29, PA} 

1.  Marriage Record:

2.  1790 Census Index/Images (online at Ancestry.com; extracted by Diana Gale Matthiesen):  these are all the STIFFLER/STIFLERs in the 1790 U.S. census, at least all those indexed on this CD.

State	County	Img#	Pg	Ln	Name	Data
PA	Bedford	09 17	17 245	38	Peter Stifler [Sr]	4-4-3-0-0
				39	Hendrey Stifler	1-0-4-0-0
				48	Peter Stifler [Jr]	1-0-2-0-0
			18 246	56	Jacob Stifler	1-4-2-0-0
		10 17	19 247	39	Jacob Stiflar	1-1-0-0-0

Our subject is too young (just 13) to be enumerated as head-of-household.  The elder Peter is presumably our subject's father, and his household includes four males under age 16.

3.  1800 Census Index/Images (online at Ancestry.com; extracted by Diana Gale Matthiesen):  there was no 1800 Federal Census of Ohio (it was not yet a state), and the 1800 Census of Kentucky was destroyed, but tax lists are substituted where available.  Listed below are all the STIFFLER/STIFLERs indexed on this CD.

List	State	County	Locality	Im	Pg	Pg1	Ln	Name	Numerical Data
1800 Census	PA	Bedford [still Bedford]	Hopewell & Woodberry	33 46	33 66	435	15	Jacob Stiffler	01201-00001-00
			Bedford & St. Clair Twps.	43 46	43 76	455	17	Peter Stiffler Jr	30010-30100-00
							24	Henry Stiffler	00010-32010-00
				44 46	44 77	456	07	George Stiffler	30110-20100-00
							11	David Stiffler	20010-00100-00
						457	05	Peter Stiffler Senr	02101-12001-00
							06	Jacob Stiffler	20100-00100-00
1800 Tax List	KY	Scott						Adam STIFLER
1807 Tax List	OH	Muskingum [now Tuscarawas]	Salem Twp.		02			George STIFFLER
1808 Tax List					06			David STIFFLER
1The pages had three sets of numbers; they were indexed by this set. 2Peter Sr was mis-indexed as being on p. 456.

It's a near certainty that the George and David STIFFLER in Bedford Co., PA, in 1800, are the George and David STIFFLER in Muskingum [now Tuscarawas] Co., OH, in 1807/8, where they also appear in the 1810 census (see next source).  Our subject is the Jacob STIFFLER living next door to his father, Peter STIFFLER, Sr.  For our subject, his data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
2 males	9 or under	1790-1800	= Jacob C. (b. 1799/1800) = Son A
1 male	16-25	1774-1784	= Jacob (b. 1776/7)
1 female	16-25	1774-1784	= Sarah (b. 1776)

4.  1810 Census Index/Images (online at Ancestry.com; extracted by Diana Gale Matthiesen):  In Maryland, there was an Ann STIFLER and a Sarah STIFFLER.  In Tuscarawas Co., Ohio, there was a David STIFFLER and a George STIFFLER.  In Loudon Co., VA, there were two John STIFLERs, Jr. and Sr.  With the Pennsylvania STIFFLER/STIFLER's given below, these constitute all the STIFLER/STIFFLER's in the 1800 U.S. Census, at least all those indexed on this CD.

State	County	Locality	Im	Pg1	Pg2	Ln3	Name	Numerical Data
PA	Bedford	St. Clair Twp.	2 6	06A	529	64	Eliza Stifler	03010-30100-00
	Bedford [now Blair]	Greenfield Twp.	2 3	11B	540	73	Conrod Stifler	10100-00101-00
						74	Michael Stifler	00010-10100-00
				12A	541	98	Jno Stifler	10010-40010-00
	Beaver	Shenango	20 34	21B	452	18	Jacob Stiffler	13010-20010-00
1. This set of numbers was stamped on every-other page. 2. This set of numbers was penciled on every page; it is the set the pages are indexed by. 3. The line numbers were written on the original pages and are consecutive for the whole of each township.

The data for our subject indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
1 male	9 or under	1800-1810	= John (b. 1802)
3 males	10-15	1794-1800	= Jacob (b. 1799/1800) = Son A = ?
1 male	26-44	1765-1784	= Jacob (b. 1776/7)
2 females	9 or under	1800-1810	= Daughter A = Elizabeth (b. 1805)
1 female	26-44	1765-1784	= Sarh (b. 1776)

5.  1820 Census Index/Images (online at Ancestry.com; Image #4 of 4; extracted by Diana Gale Matthiesen):  these are the only Jacob STIFFLER/STIFLERs in the 1820 U.S. census (I did a page-by-page check of Shenango Twp. just in case he was there and overlooked by the indexer, but he was not found):

1820	PA	Beaver Co.	Hanover Twp.	p. 118	Ln. 2	Jacob Stiffler	000100-10100-0-100
1820	PA	Beaver Co.	Hanover Twp.	p. 119	Ln. 8	Jacob Stifler	211101-21010-0-100

Of the two Jacob STIFFLER/STIFLERs found in Hanover Twp., Beaver Co., PA, one is too young to be our subject and the other is too old.  The younger Jacob is obviously newly married and is probably our subject's son.  If we grant that the older Jacob is tallied in the wrong age-class — as often happens in these pre-1850 censuses — then the data do "work" for our subject because they indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
2 males	9 or under	1810-1820	= Henry (b. 1817) = Paul (b. 1814)
1 male	10-15	1804-1810	= ?
1 male	16-18	1801-1804	= John (b. 1802)
1 male	19-25*	1794-1801	= Son A
0 males	26-44	1775-1794	= Jacob (b. 1776/7)
1 male	45 or over	in or bef. 1775	= -----
2 females	9 or under	1810-1820	= Daughter C = Daughter B
1 female	10-15	1804-1810	= Elizabeth (b. 1805)
1 female	26-44	1775-1794	= Sarah (b. 1776)
1	person engaged in agriculture
*In the 1820 Census, the third column is age class 16-18 and the fourth column is age class 16-25; therefore, any individual in column three is duplicated in column four.  By subtracting the number in column three from the number in column four, you can create an age class "19-25."

5.  1830 Census Index/Images (online at Ancestry.com):  can't find.  There's a Jacob STIFFLER in Beaver Co., PA, and a Jacob STIFLER in Indiana Co., PA, however both are too young to be our subject.  There are no Jacob STIFLER/STIFFLERs in Ohio.

6.  1840 Census Index/Images (online at Ancestry.com, Image #5-6 of 12; extracted by Diana Gale Matthiesen):

1840

OH

Jackson Co.

Franklin Twp.

p. 6B-7A

Ln. 30

Jacob Stiffler

000 000 001 - 000 010 001

_______

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
1 male	60-69	1770-1780	= Jacob (b. 1776/7)
1 female	20-29	1810-1820	= Daughter C
1 female	60-69	1770-1780	= Sarah (b. 1776)

Listed one line below son, Henry STIFFLER, and one line above son, Paul STIFFLER.

7.  1850 Census Index/Images (online at Ancestry.com; Image #20 of 32):  Franklin Twp., Jackson Co., OH, p. 304A, 1039/1041, enumerated 13 Sep 1850, official enumeration date 1 Jun 1850 (extracted by Diana Gale Matthiesen):

Jacob Stifler	73	M		Farmer	400	Pa
Sarah     "	72	F				Pa
Mary Ann  "	13	F				Pa
John      "	11	M				Pa

Sarah is too old to be Mary Ann's and John's mother, so presumably they are grandchildren.  Also, either she has shaved a couple of years off her age, or the 1776 birth-year for her is wrong.  Living next to (widowed daughter-in-law?), Mary (__?__) STIFLER (æ 53, b. PA), on one side; and, on the other side, living next to son, Henry STIFFLER (æ 33, b. PA, wife Nancy).

8.  1860 Census Index/Images (online at Genealogy.com):  not found.