I have information on this family - I did not do this research, but it was given to me in 1990. It goes like this:
Francis Mann & wife Isabell of Amelia County, VA
REMARKS:
(My rcords show Francis Mann, born abt. 1700, Surrey Co., England; 'will' dated Sept. 4, 1753, proved Dec. 27, 1753, Amelia Co., Va. His wife I show was Elizabeth Page, born before 1704, Surrey Co., England; died after Dec. 12, 1753; married abt. 1720, Henrico Co., Va.) This marriage to Elizabeth is also supported by the "Valentine Papers, Vol 1-4, 1864-1908, Mann Family, Lunenburg County Records."

Children:
Lucy born 20 April 1722, Bristol Parish, VA-Spouse Nichols
REMARKS:
(Lucy died in Smith Co., Tenn.)

Page born 1726, Spouse Patience (he died 1803, Chesterfield Co.VA)
REMARKS:
(Page, born 1726, Henrico Co., Va.; died before Jan. 13, 1802 since his will was probated Jan. 13, 1802. (Will Book I, Page 297, Chesterfield Co., Va.)

Francis born 1728, died 1782, Dale Parish, Chesterfield Co, VA - wife Obedience
REMARKS:
(Francis was born in Prince George Co., Va., the area that became Amelia Co., Va. upon the formation of that county in 1735; Obedience was born abt. 1730; died 1788, Chesterfield Co., Va.)

Cain born 1730, married December 1, 1791, Amelia County, VA, Died abt Oct 1807, Amelia Co, VA, wife Mary Wilson Ford
REMARKS:
(I have Cain born 1729, Henrico Co., Va. Children: Joel, William, John, and Lucy.)

Robert born 7 Feb 1732, died 1780 Halifax Co., VA - wife Phoebe Chaffin
REMARKS:
(Robert died Feb. 17, 1780; married, abt. 1753, Phoebe Vaden. They had 12 children.)

Able, born 1734, married Keziah Roach
REMARKS:
(The Valentine Papers show that Francis Mann, in his 'will' used his son's middle name, Alleman, who was born in Prince George Co., Va. Marriage date was Mar. 6,1783, Amelia Co., Va.)

John, born 1736
REMARKS:
(Married Sarah Ford on May 19, 1759, Amelia Co., Va. Believe the Marriage Bond Date was May 14, 1759.)

Joel, died 1777, Amelia Co., VA
REMARKS:
(Born bef. 1738 in Amelia Co., Va.; died between 1770 and 1777; never married; Will executed May 7, 1770; Will probated 1777; all events taking place in Amelia Co., Va.)

Agnes Mann, born 1742, husband Hezeniah Coleman
REMARKS:
(Agnes Mann was born 1742 in Amelia Co., Va.; married Hezekiah Coleman and they had a daughter, Elizabeth Coleman.)

Children of Francis and Obedience:
Joseph, born 1748
REMARKS:
(Nothing further)

Beverly, born 1750, married 5 Oct 1772, Charlotte Co., VA, died August 1822, Harrodsburg, Mercer Co., KY, wife Mary Caldwell
REMARKS:
(I show wife's full name was "Mary Thankful Alice Caldwell," born 1757, Charlotte Co., Va.; died abt. 1820, Harrodsburg, Mercer Co., Ky.)

Dicey, born 3 Sept 1753, died 1785, husband John Caldwell
REMARKS:
(Dicey, died Feb. 27, 1785; John Caldwell, born 1746, Va.; died Jun. 11, 1829, Ky.; married Jun. 1, 1775. Six children a result of this union.)

Phoebe, born 1756, married abt 1774, Logan Co., KY, husband David Varner Caldwell
REMARKS:
(David Varner Caldwell, born Mar. 11, 1753; died Mar. 26, 1840, Mercer Co., Ky. They had 14 children.)

Elizabeth "Betsey", born 1759, died March 1844, Boyle Co., KY, married 2 Nov 1780, Bedford Co., VA
REMARKS:
(Husband was John Henderson, born abt. 1750; died Aug. 1826, Mercer Co., Ky. Twelve children from this marriage.)

Francis, Born 1761
REMARKS:
(Nothing further)

Edy
REMARKS:
(Nothing further)

Lucy, husband Jackson
REMARKS:
(Nothing further)

Martha, husband Caskin
REMARKS:
(Nothing further)

• Married:

1. Lucy MANN b: 20 APR 1722 in Bristol Parish, VA
2. Page MANN b: 1726 in Henrico Co., VA
3. Francis MANN b: 1728 in Amelia Co. VA
4. Cain MANN b: 1729 in Henrico Co., VA
5. Robert MANN b: 7 FEB 1732 in VA
6. Able Alleman MANN b: 1734
7. John MANN b: 1736
8. Joel MANN b: ABT 1738 in Amelia Co. VA
9. Agnes MANN b: 1742 in Amelia Co. VA