"Toliver" is the English pronunciation and spelling of the Italian surname, TALIAFERRO, a name so long in Britain that it no longer connotes Italian ancestry.

— born in ?
11.  Elizabeth JACOBS; survived to marry

— born in Perry Co., OH:
12?  Toliver D. JACOBS, b. 1 Jul 1839; d. 8 Jul 1907

1.  Jordan R. Dodd, ed.  1993.  Kentucky Marriages:  Early to 1850.  Liahona Research, Orem, UT (Broderbund CD-229):

Jacobs, Taliaferro

Walker, Lucretia

9 Dec 1811

Fauquier Co.

2.  1820 Census Index/Images (online at Ancestry.com; Image #23 of 53; extracted by Diana Gale Matthiesen):

1820

VA

Culpeper Co.

Roll 133

p. 45/82

Ln. 1

Talaiferro Jacobs

400010-11000-0-100

no slaves

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
4 males	9 or under	1810-1820	= Levi (b. 1816) = Solomon (b. 1813)
1 male	26-44	1775-1794	= Taliaferro (b. 1789)
1 female	9 or under	1810-1820	=
1 female	10-15	1804-1810	=
0 female	16-25	1794-1804	= Lucretia (b. 1795)
1	person engaged in agriculture

Lucretia was tallied in the wrong age class, but surely, these are our subjects.  List was roughly alphabetized.

3.  1830 Census Images (online at Ancestry.com; Image #33 of 68 — indexed "Thaferro"; extracted by Diana Gale Matthiesen):

1830

VA

Fauquier Co.

Roll M19_194

p. 419

Ln. 20

Taliaferro Jacobs

122 101 - 210 010

no slaves

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
1 male	4 or under	1825-1830	=
2 males	5-9	1820-1825	=
2 males	10-14	1815-1820	=
1 male	15-19	1810-1815	=
1 male	30-39	1790-1800	= Taliaferro (b. 1789)
2 females	4 or under	1825-1830	= =
1 female	5-9	1820-1825	=
1 female	20-29	1800-1810	=

4.  1840 Census Index/Images (online at Ancestry.com, Image #9-10 of 20; extracted by Diana Gale Matthiesen):

1840

OH

Perry Co.

Hopewill Twp.

Roll M704_419

pp. 79B-80A

Ln. 11

Oliver Jacobs

111 130 010 - 011 110 100

0303000

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
1 male	4 or under	1835-1840	=
1 male	5-9	1830-1835	=
1 male	10-14	1825-1830	=
1 male	15-19	1820-1825	=
3 males	20-29	1810-1820	=
1 male	50-59	1780-1790	= Taliaferro (b. 1789)
1 female	5-9	1830-1835	=
1 female	10-14	1825-1830	=
1 female	15-19	1820-1825	=
1 female	20-29	1810-1820	=
1 female	40-49	1790-1800	= Lucretia (b. 1795)
3	persons employed in agriculture
3	persons employed in manufacture and trades

5.  1850 Census Index/Images (online at Ancestry.com; Image #114 of 427 — indexed "Galiaffus Jacob"):  Biglick Twp. (Dist. 48), Hancock Co., OH, p. 445B, 139/139, enumerated 3 Sep 1850, official enumeration date 1 Jun 1850 (extracted by Diana Gale Matthiesen):

Taliaferro Jacob	62	M		laborer		Va
Lucretia	55	F				"
Solomon	37	M		laborer		"
Emily	23	F				"
James	21	M		laborer		"
Robert W	20	M		laborer		"
Taliafero D	11	M				O
Williams H	9	M				"
John T	3	M				"

Lucretia is certainly too old to have birthed John and probably too old to have birthed William — it's a stretch for her to have birthed Taliaferro.  Is John an orphaned grandson?  Or is he Emily's illegitimate son (see 1860)?  Daughter Elizabeth appears to have been skipped by timing — an an enumerator or subjects who failed to follow instructions.  That is, Elizabeth married David EGBERT (æ 28) on 22 Aug 1850 in Hancock Co., but David was enumerated as unmarried and living with his parents on 9 Aug 1850.  In the 1860 census, David EGBERT (æ 39) is living alone, so apparently Elizabeth died without surviving issue.  Listed next to Levi JACOB (æ 34, b. OH, wife Elizabeth Ann). Listed three households from William ILIFF, who married our subjects's daughter, Emily, in 1851.

6.  1860 Census Index/Images (online at Genealogy.com, Image #7 of 28):  Vanlue P.O., Big Lick Twp., Hancock Co., OH, Roll 982 (Book 1), p. 219A, PN 45, 315/305, enumerated 13 Jun 1860, official enumeration date 1 Jun 1860 (extracted by Diana Gale Matthiesen):

Lucretia Jacobs	64	F				100	Va
Toliver    "	20	M		Farm Laborer			O
William H  "	19	M		"     "			"
Emily Iliff	34	F		Servant			Va
John      "	12	M					O
Thomas J  "	6	M					"
James M   "	5	M					"
Sarah Ann "	1	F					"

Emily did not marry William ILIFF until 1851, and William did not have a son, John, with him in the 1850 census.  It appears that the John ILIFF (æ 12), here, may the John T. JACOBS (æ 3), in the 1850 census, raising the question as to his parents and true surname.  Was he an orphaned grandson?  Or was he Emily's illegitimate child, adopted by William ILIFF?  Listed next to Levi JACOBS (æ 44, b. VA, wife Elizabeth).