1.  LDS.  Family Search: Internet Genealogy Service: Pedigree Resource File (index to CDs, online at FamilySearch.org).

Jacob SCHAEFFER Marriage: 1820, Westfield Presbyterian Church, New Jersey Spouse: Eleanor CONNETT Birth: 1795; Place: Westfield, Essex, New Jersey Father: Isaac CONNETT; Mother: Mary MOON Source: patron submission

Eleanor's parents were in Ohio by 1805, so there's no way she was married in New Jersey.  The big question is whether the year was a guess or supported by evidence.

2.  1810 Census Index/Images (online at Ancestry.com):  not found in Ohio, but the entire 1810 Ohio census was lost (except for Washington County); there are dozens of Jacob SCHAEFFER/SHAFFER/etc.'s in Pennsylvania, with no way to tell which might be our subject, if any.

3.  1820 Census Index/Images (online at Ancestry.com, Image #9 of 10; extracted by Diana Gale Matthiesen):

1820

OH

Fairfield Co.

Hocking Twp.

Roll M33_87

p. 80/154

Ln. 20

Jacob Shaeffer

021110-31300-0-300

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
2 males	10-15	1804-1810	= Son B = Son A
1 male	16-18	1801-1804	= ?
1 male	26-44	1775-1794	= Jacob (b. 1784/5)
3 females	9 or under	1810-1820	= Anna Maria (b. 1818) = Daughter C = Daughter B
1 female	10-15	1804-1810	= Daughter A
3 females	16-25	1794-1804	= ? = ? = Eleanor (b. 1794/5)
3	persons engaged in agriculture
*In the 1820 Census, the third column is age class 16-18 and the fourth column is age class 16-25, which means any individual in column three is duplicated in column four.  So, for an accurate representation of the household, the number in column three should be subtracted from the number in column four.

The question here is how many of these are Jacob's or Eleanor's children and how many are other kin, boarders, or hired help.  Anna Maria is almost certainly Eleanor's daughter, but she may be the only one who is actually their child.  Or they may all be Jacob's children, except for the two females in Eleanor's age class.

4.  1830 Census Index/Images (online at Ancestry.com, Image #3 of 20; extracted by Diana Gale Matthiesen):

1830

OH

Fairfield Co.

Hocking Twp.

Lancaster

Roll 130

p. 202

Ln. 20

Jacob Shaffer

001 200 100 - 222 111

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
1 male	10-14	1815-1820	= ?
2 males	15-19	1810-1815	= ? = ?
1 male	40-49	1780-1790	= Jacob (b. 1784/5)
2 females	4 or under	1825-1830	= Henrietta (b. 1827/8) = Daughter E
2 females	5-9	1820-1825	= Sarah (b. 1824/5) = Daughter D
2 females	10-14	1815-1820	= Anna Maria (b. 1818) = Daughter C
1 female	15-19	1810-1815	= Daughter B
1 female	20-29	1800-1810	= Daughter A
1 female	30-39	1790-1800	= Eleanor (b. 1794/5)

The three teenage males were not in the household in 1820, so they could not be our subject's children.  The girls in 1820 are here in 1830 (and all but the eldest is in 1840), so they would appear to be our subject's daughters.

5.  1840 Census Index/Images (online at Ancestry.com, Image #2-3 of 21 — list was roughly alphabetized; numerical data pages precede name pages; extracted by Diana Gale Matthiesen):

1840

OH

Fairfield Co.

Hocking Twp.

Roll 394

pp. 320A-320B

Ln. 2

Shafer Jacob

120 100 010 - 012 230 100

0111000

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
1 male	4 or under	1835-1840	= Jacob C. (b. 1837/8)
2 males	5-9	1830-1835	= Eli (b. 1832/3) = Theodore (b. 1830/1)
1 male	15-19	1820-1825	= ?
1 male	50-59	1780-1790	= Jacob (b. 1784/5)
1 female	5-9	1830-1835	= Cornelia (b. 1834/5)
2 females	10-14	1825-1830	= Henrietta (b. 1827/8) = Daughter E
2 females	15-19	1820-1825	= Sarah (b. 1824/5) = Daughter D
3 females	20-29	1810-1820	= Anna Maria (b. 1818) = Daughter C = Daughter B
1 female	40-49	1790-1800	= Eleanor (b. 1794/5)
1	person employed in agriculture
1	person employed in commerce
1	person employed in manufactures and trades

The teenage male was not in the household in 1830, so he appears not to be their son. The three sons born in the 1830s are with them in 1850, so they do appear to be their sons.  The seven daughters from the 1830 census are still here, so they appear to be our subject's children, too.

6.  1850 Census Every-Name-Index/Images (online at Ancestry.com, Image #28 of 44):  Hocking Twp., Fairfield Co., OH, Roll M432_677, p. 327B, 670/807, enumerated 21 Aug 1850, official enumeration date 1 Jun 1850 (extracted by Diana Gale Matthiesen):

Jacob Shaeffer	65	M		Farmer	10,000	Penna
Eleanor   "	55	F				New Jersey
Sarah     "	26	F				Ohio
Henrietta "	22	F				"
Theoadore "	19	M		Laborer		"
Eli       "	17	M		Laborer		"
Cornelia  "	15	F				"
Jacob C   "	12	M				"

7.  1860 Census Every-Name-Index/Images (online at Ancestry.com, Image #33 of 47):  Lancaster P.O., Hocking Twp., Fairfield Co., OH, Roll M653_960, p. 72A, PN 142, 1003/971, enumerated 6 Aug 1860, official enumeration date 1 Jun 1860 (extracted by Diana Gale Matthiesen):

Elenor Shaeffer	65	F		Widowed	6000	128	New Jersey
Sarah J    "	33	F					Ohio
Henrietta  "	31	F					"

Listed next to son, Theodore SHAEFFER (æ 29, b. OH, wife Mary A.).

8.  1870 Census Every-Name-Index/Images (online at Ancestry.com, Image #42 of 77 — indexed "Elener"):  Lancaster P.O., Berne Twp., Fairfield Co., OH, Roll M593_1198, p. 40B, PN 42, 305/313, enumerated 15 Jun 1870, official enumeration date 1 Jun 1870 (extracted by Diana Gale Matthiesen):

Eckert Henry S	55	M	W	Farmer	40,000	4,000	Ohio
______ Ann M	50	F	W	Keeping House			Ohio
[Henry & Ann's children]
Shaeffer Elaner	75	F	W	Lives with Son		3,500	Ohio

Henry is Eleanor's son-in-law, not her son.  A birth in 1794/5 in Ohio is very early (Ohio didn't even become a state until 1803); in other censuses, Eleanor gives her birthplace as New Jersey, which jibes with other information.

9.  1880 Census Every-Name-Index/Images (online at Ancestry.com):  not found.