Family Search http://www.familysearch.com/
John Hancock's first wife, Martha Haywood, was born 7 November 1801 in Washington County, Indiana, and died 28 April 1839 in Harrison County, Indiana. John Hancock's second wife, Mary Kearns, was married first to William Jackson. Mary and William's oldest son, Thomas Kerns Jackson, married Mathew (John Hancock's brother) and Elizabeth Hooker Hancock's daughter, Rebecca Ann.
-----
Partial transcript of letter to Mr. O. L. Wilson from William Hancock:
March 12. 1848
Indiana
Harrison County
Mr. O. L. Wilson
Dear Cousin I imbrace this opportunity of informing you that I am well at this time with the reast of the connection and enteraining the Strongest hopes that thease few lines may find you in the Same enjoyment of the greatest blessing of our great Creator... My Sister Mary Jane was maried on the 11. of March 1847 to R. Roberts of Floyd County. Rebecker Ann in September last to Mr. Thomas Jackson a Step Son of Uncle John Hancock... Write to me if you please I remain
Your friend &. cousin
Wm Hancock
[William is the son of Mathew Hancock; Osburn Lamar Wilson is William's second cousin - their grandmothers being Sarah and Jane Skeen, daughters of Ruth Lamar and Matthew Skeen.]
-----
Ancestry.com Images Online, image 232
1850 U.S. Census, Blue River Township, District 45, Harrison County, Indiana
Enumeration Date: 15 August 1850
h/h 285/285 John Hancock, 50, M, Farmer, $1300, b. North Carolina
Mariah Hancock, 52, F, b. North Carolina [MARY KEARNS/KERNS JACKSON]
Benjamin Hancock, 19, M, Farmer, b. Indiana
Jane L/S. Hancock, 79, F, b. North Carolina
Ruthey Hancock, 46, F, b. North Carolina, insane
Deborah Hancock, 17, b. Indiana
Nancy P. Hancock, 16, F, b. Indiana