1a.  Elizabeth Prather Ellsberry.  [nd]  Marriage Records of Christian County, Kentucky, 1795-1825.  Typescript (LDS Film No. 0908037, Item #6).  On p. 57:

Thompson, John to Anny Bobbitt, d. of Isham

7 Feb 1806

Stephen Bobbitt

Stephen is Amy's brother.

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

Thompson, John

Bobbitt, Amy

7 Feb 1806

Christian Co.

1c.  D.L. Murray & N.R. Murray, compilers.  1995. Marriage Index: IL, IN, KY, OH, TN, 1720-1926 (Broderbund CD-2):

Thompson, John

Bobbitt, Anny

7 Feb 1806

Christian Co., KY

2.  1810 Census  (extracted by A. Robert Matthiesen; see 1810 Table): 

1810

John Thompson

10010-10110

KY

Christian Co.

p. 60

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
1 male	9 or under	1800-1810	= Edgar (b. 1808)
1 male	26-44	1765-1784	= John (b. 1778)
1 female	9 or under	1800-1810	= Daughter A
1 female	16-25	1784-1794	= Amy (b. 1788/9)
1 female	26-44	1765-1784	= mother?

3.  1820 Census Index/Images (online at Ancestry.com; Image #6 of 23; extracted by Diana Gale Matthiesen; see 1820 Table): 

1820

KY

Christian Co.

p. 33

Ln. 21

John Thompson

320110-20110-0-400

no slaves

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
3 males	9 or under	1810-1820	= John  = James (b. 1813/4)  = Presley (b. 1811/2)
2 males	10-15	1804-1810	= Lorenzo (b. 1810)  = Edgar (b. 1808)
1 male	19-25*	1794-1801	= ?
1 male	26-44	1775-1794	= John (b. 1778)
2 females	9 or under	1810-1820	= Muriel (b. 1817/8)  = Daughter B
1 female	16-25	1794-1804	= Daughter A
1 female	26-44	1775-1794	= Amy (b. 1788/9)
4	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; 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."

The eldest boy is not a son because he did not appear int he 1810 Census.  As for the eldest girl...  Amy is too young to have had children by a former marriage, but John is not.  The fact that John is ten years older than Amy and that there is an older child in the household strongly suggest that John had a former wife, one who perhaps died giving birth to their only child.

4.  Christian County Genealogical Society (Hopkinsville, KY).  1995.  Christian County, KY, Census Records, 1820-1830-1840.  Simmons Historical Publ., Melber, KY.  On p. 60:

1830

Thompson

John

010 220 010 - 112 010 100

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
1 male	5-9	1820-1825	= F. Smith (b. 1824)
2 males	15-19	1810-1815	= John  = James (b. 1813/4)
2 males	20-29	1800-1810	= Presley (b. 1811/2)  = Lorenzo (b. 1810)
1 male	50-59	1770-1780	= John (b. 1778)
1 female	4 or under	1825-1830	= Serena (b. 1825/6)
1 female	5-9	1820-1825	= Melissa (b. 1822/3)  = Missenier (b. 1820)
2 females	10-14	1815-1820	= Muriel (b. 1817/8)  = Daughter B
1 female	20-29	1800-1810	= Daughter A
1 female	40-49	1780-1790	= Amy (b. 1788/9)

There were three John Thompson's in the 1830 Census.  With regard to determing which one was the above John Thompson, it was easy to eliminate the John on p. 40 because both he and his wife were too old to be John and Amy (Bobbitt) Thompson.  In contrast, it was difficult to separate the two on pp. 7 and 10.  I decided on the John on p. 10 because of the two, only he had enough daughters in the 1820-1830 age class to be consistent with Amy's three daughters in the 1840 Census.

5a.  1840 Census Index (online at GenealogyLibrary.com):

1840

Thompson, Amy

KY

Christian Co.

p. 232

5b.  Christian County Genealogical Society (Hopkinsville, KY).  1995.  Christian County, KY, Census Records, 1820-1830-1840.  Simmons Historical Publ., Melber, KY.  On p. 60:

1840

Thompson

Amy

000 120 000 - 001 200 010

These data indicate:

No. & Sex	Age Class	Therefore Born	Individuals Inferred
1 male	15-19	1820-1825	= F. Smith (b. 1824)
2 males	20-29	1810-1820	= John  = James (b. 1813/4)
1 female	10-14	1825-1830	= Serena (b. 1825/6)
2 females	15-19	1820-1825	= Melissa (b. 1822/3)  = Missenier (b. 1820)
1 female	50-59	1780-1790	= Amy (b. 1888/8)

Daughters A & B either married or died.

6.  1850 Census Index/Images (online at Ancestry.com; Image #107-108 of 119):  District 2, Christian Co., KY, pp. 412B-413A, enumerated 10 Oct 1850, official enumeration date 1 Jun 1850 (extracted by Diana Gale Matthiesen):

772	819	Anna Thompson	61	F			S Carolina
		Cyrina F. "	24	F			Kentucky
	820	Mariah S. Myres	32	F			"
		Elivra      "	13	F			"
		Louisa      "	10	F			"
		Octavia     "	8	F			"
		Malissa Myres	6	F			"

Mariah is Amy's widowed daughter, Muriel (or is Muriel, Mariah?).  They are living next door to Amy's son, Presley N.O. THOMPSON, who is next door to Amy's son, James F. THOMPSON. 

7. Christian County, Kentucky, Tax Rolls, 1797-1816.  Heritage Quest, Microfilm No. V20-72 (extracted by Diana Gale Matthiesen):

Year	District	Dates of  Receiving  Lists	Persons Names  Chargeable with  the Tax	A	B	C	D	E	F	Acres			Watercourse	In Whose Name  Entered	In Whose Name  Surveyed	In Whose Name  Patented
										1st	2nd	3rd
1797-1806	-	-	[not found]	-	-	-	-	-	-	-	-	-	-	-	-	-
1807	West		Thompson John	1	-	-	-	1	-	-	-	400	T water	his own name	same	-
1808	No. 2		Thompson John	1	-	-	-	2	-	-	-	400	Trade water	N Ponder	same	-
1809	No. 2	Oct 25	Thompson John "wheelwright"	1		-	-	2	-	-	-	400	Clifty fork of the Tradwater	Nathaniel Ponder	-	-
1810		July 20	Thompson John	1		-	-	2	-	-	-	400	T water	Nathl Ponder	Same	-
1811	-	-	[not found]	-	-	-	-	-	-	-	-	-	-	-	-	-
1812			Thompson John	1		-	-	1	-	-	-	400	T water	N Ponder	Same	-
1813			Thompson John	1		-	1	1	-	-	-	400	T Water	N Ponder	same	-
1814			Thompson John	1		-	-	1	-	-	-	400	T water	N Ponder	same	-
1815			Thompson John	1		-	-	-	-	-	-	40?	C Fork	N Ponder	same	-
1816	-	-	[not found]	-		-	-	-	-	-	-	-	-	-	-	-
Legend for numerical data [grey indicates that particular datum was not taken that year]:  A = White Males 21 or over; B = White Males 16-20; C = Blacks over 16; D = Total Blacks; E = Horses & Mares (gelded male horses and female horses); F = Stud Horses (intact male horses); 1st/2nd/3rd refer to 1st Rate, 2nd Rate, or 3rd Rate land.

Although he is missing in 1816, he is picked up again in 1819-23 (and in the 1830 Census).

8.  Letter from Mrs. Fred R. Jueneman (223 East Oakland, Rapid City, SD) to Winnifred Ranford (10607 Pinyon Ave., Tujunga, CA) dated 11 June 1964, a photocopy of which was passed on from Winnie Ranford to my aunt, Betty Ann (Matthiesen) Cogliati, who passed it on to me.

My husband's ancestor was James Thompson who had a brother John Thompson, they came from Ireland to America prior to the Revolutionary War and settled near Philadelphia, Pa.  James served in the War and then moved to So. Carolina and on to Tenn. with his brother John.  From Tenn. they moved on to Christian Co. Ky.  I have a list of children for James Thompson who married a Miss Patterson.  Correction- I have only the name of 1 son. 1.  John Thompson b. 1778, m. 1806 to Amy Bobbitt         issue     1.  Edgar Mandelbert Thompson m. Ann Williams     2.  Lorenza D. Thompson     3.  Presly N.O.   "     4.  John W.       "     5.  James Frank   "     6.  Smith         "     7.  Missaniah     "     m. Dim Dobbins     8.  Sidney        "     m. Henry Myers     9.  Melissa       "     m. Lewis McCain    10.  Sirena        "     m. Daniel Dulin I have a copy of an old letter written by James Frank Thompson (#5) son of John Thompson and Amy Bobbitt.  He does not give the names of the children of John Thompson brother of James, born in Ireland- or of any of James' other children.  Another correction- he gives Jeff Thompson, son of John (b. in Ireland) Thompson, who had a command and fought so bravely in the Confederate service... John Thompson b. 1778, d. 1834 at Christian Co. Ky. m. Amy Bobbitt dau. of Isham Bobbitt and Elizabeth Jane, had a son Edgar Mandelbert Thompson who married Ann Williams in 1829.

As the writer is apparently a descendant of Edgar Mandelbert and Ann (WILLIAMS) THOMPSON, she goes on to give the WILLIAMS genealogy.

9.  Joshua Daniel Bobbitt.  1999.  Pedigree of Joshua Daniel Bobbitt:  The Bobbitt Line. [link died]  Family Tree Maker home page.  It states there that:

William James Bobbitt marries Elizabeth Hale on July 8, 1808 in Trigg County, Kentucky.  They were married by James Thompson a justice of the peace, and a brother to William Bobbitt's brother-in-law, John Thompson, husband of sister Amy (Bobbitt) Thompson.B

10.  National Society of the Daughters of the American Revolution. Lineage Books of the Charter Members. Vols. 108, 124 (DAR ID Nos. 107266, 123072).

1. William Finley Sanders (1841-1906) m. 1877 Melissa Jane Thompson (b. 1841).      2. John Sanders (1799-1863) m. 1818 Elizabeth Powell (1802-92); Edgar Mandelbert Thompson (1808-65) m. 1829 Ann Williams (1809-1902).      3. John Thompson (b. 1778-1834) m. 1806 Amy Bobbitt; John Powell m. Polly —.      4. James Thompson m. — Patterson; Isham Bobbitt m. 1775 Elizabeth —.  "Sergt. James Thompson (1757-1803) served as quartermaster in Colonel Hazen's regiment at Yorktown. He was born in Ireland; died in Christian County, Ky."

11.  LDS.  Ancestral File (online).

A.  The Anna Thompson in the 1850 Census appears to be the above John Thompson's widow, so it is probably safe to assume that she and John resided in Christian Co. continuously from the time of their marriage in 1806 until he died in 1834.  Therefore, the above John Thompson should be one of the John Thompsons in the 1810, 1820, and 1830 censuses of Christian Co., KY, but I'm having a devil of a time making the numbers fit.

B.  Trigg County was not formed from Christian Co. until 1820, so Trigg Co. did not exist when William and Elizabeth were married in 1808.  They were officially married in Christian Co., not Trigg Co.  In the 1810 Census, William, John, and Isham Bobbit show up together on p. 55 of the Christian Co. Census.  In the 1820 Census, when Christian and Trigg Cos. were enumerated separately for the first time, William had left KY, but John and Stephen show up on pp. 34 and 36 in Christian Co., not in Trigg Co.  The only Bobbitt who shows up in Trigg Co. is Isham Jr., who marries in Trigg Co. in 1824 and shows up in the 1830 Census of Trigg Co.  All other Bobbitt marriage and census records for the two counties are for Christian Co., so I fail to see what places William in Trigg Co. in 1808.

There was, indeed, a James Thompson, JP, performing marriages in Christian County in the first decade of the 1800s, and he may very well have been the brother of the above John Thompson.  (There was a very notable James E. THOMPSON who was Clerk of the County Court in Trigg Co. for 20 years, but he was not born until 1805, so he could not possibly be the one who married William and Elizabeth in 1808.)