Harmon of York & Adams County, Pennsylvania

I am looking for more information on my Harmon Line. Most of the information I have comes from the Lower Burmudian Cemetery, Adams County, Pennsylvania and few extracts of Probate/Will records and I am not sure of how accurate it is. The information I have is:

George Harmon
b. 30 Jul 1750
m. Abigial
d. 28 Jan 1826, Pennsylvania
bur. Lower Burmudiam Cem, Adams County, Pennsylvania
Info on George:George who died 28 jan 1826 had a wife Abigail , a son David, a son George and a son John who died 20 Nov 1819 age 42-7-8.
The george who died in 1826 is buried in the same cemetery as his son George who died in 1853. The headstone of the 1826 George said he was age 75-5-28 when he died . This calculates to a birth date of 30 July 1750

Children:
George Harmon b. 1787
David Harmon
John Harmon d. 1819

George Harmon
b. 7 Jan 1787
m. Catherine (b. 16 May 1792 d. 8 Sep 1842)
d. 15 May1853
bur. Lower Burmudiam Cemetery, Adams Co, PA
Info on George: 1850 Census - Lattimore, Adams County, PA

Children:
Joseph Harmon 1820 (married Margaret Bortner)
David Harmon 1821
Christina Harmon

I would like to find any records on the family such as will Probate, Land, Census, Military and any marriage.


(PS anyone needing southern MO Research or NW Arkansas Research send me a message I might be able to help)