Thanks to Find-a-grave member #94910528 for the following information........

His title from the Revolutionary War is Capt. and his nickname was "Miller"

"John Hardin was born in Fauquier, Prince William, Virginia, United States. He was the son of Major John Hardin (1710 – 1789) and Catherine Marr Hardin (1711 – 1786). He married Isabella Strawbridge (1733-1814) at Faquier, Prince William, Virginia, United States on May 3,1751. Isabella was the daughter of Christopher Strawbridge. Don't know her mother's name.

John & Isabella had the following known children: Jack Hardin 1751 – 1818; Isabel Hardin 1752 – 1757; Cato Hardin 1754 – 1779; Elizabeth Hardin 1757 –, Nestor Hardin 1759 – 1839; Hector Hardin 1762 – 1800; John Hardin 1762 – 1853; William Henry Hardin 1766 – 1825; Absolom Hardin 1767 – 1850; Mariam Hardin 1768 – 1850; Matilda Hardin 1772 –; Mary Ann Hardin 1775; George Hardin 1776 – 1854; Elizabeth Hardin 1778 – 1779; Mehelia Hardin 1778 – and Alice Alcy Hardin 1783 – 1823.

John "Miller" Hardin Timeline

1733 - born Pr Wm Co which is now Fauquire Co

SPOUSE: Isabella Shubrach/Strawbride 1733-17 May 1814

Captain in the border wars of the American Revolution. Owned a grist mill at George's Creek, Fayette Co., PA.

1773 - Feb 18, granted 296 arces Dunmore Co.
1778 - Jan 7, granted 44 acres in Hampshire Co.

1782 - May 1, served as Capt under Col. Wm Crawford, Fayette Co, PA

1782 - May 16 to Jun 16, served as Capt in Westmoreland Mil, PA Militia

1784 - Militia Loan , a certificate of public debt #3161, L18.6.0, was issued to John Hardin for a tour of active duty in the Westmoreland Co. Militia as Capt of a Company from May 16-Jun 16, 1782.

1786 - Springhill Twp, PA; owned a grist-mill assessed at L100 located near Lewis Hunter's residence

1788 - Jun 4, bequeath 5 shilling by father's will
1789 - his grist-mill had passed onto his son Henry
1803 - Buried in family cemtery on George's Creek.
1803 - May 13, will probated in Bedford Co, PA; mentions listed children
1803 - Jun 3, Will dated
1811 - Mar, Estate settlement in Fayette Co, PA
CHILDREN:13

Reference:
REDBOOK - Fayette Co from Westmoreland from Bedford 1771 from Cumberland 1750
WEST VIRIGINIA REVOLUTIONARY ANCESTORS, 1983 page 128
Estate settlements: Mar 1811, John Harden (?) mentions: wife, Isabella, sons:
John, Absolom, Hector; daus, Moliha, Alice and others.
INTEREST REGISTER, Vol A, page 107, Militia Loans of 1784 and 1785, "Public
Debt", Records of the Comptroller General, at the Division of Archives and
Munscripts.
THE HISTORY OF THE HARDIN FAMILY
Above from Diane Miller

Some famous people related to John Miller Hardin through his dad, Maj. John Hardin according to ancestry.com: Helen Adams Keller(1880-1968) American author and activist (4th Cousin 4 times removed), James Matthew Barrie(1860-1937) Scottish Novelist (3rd Cousin 6 times removed), Mark Twain(1835-1910)American Author (4th Cousin 5 times removed), Jimmy Earl Carter(1924-) 39th President of the United States of America (4th Cousin 6 times removed), Ronald Reagan(1911-2004)40th President of the United States of America (2nd Cousin 11 times removed), Theodore Roosevelt(1858-1919) 26th President of the United States (6th Cousin 4 times removed), Samuel Morse(1791-1872) American Inventor (7th Cousin 3 times removed), Benjamin Harrison(1833-1901) 9th Cousin, John F. Kennedy(1917-1963) 35th President of the United States (8th Cousin 2 times removed), Margaret I of Denmark(1353-1412) Queen Consort of Scotland (2nd Cousin 14 times removed) and many others.

Two of his sons are on find a grave: John "Jack" Hardin Memorial #126878006 and Nestor Hardin.

JOHN HARDIN'S GRAVESITE

U.S. Veterans Gravesites, ca.1775-2006 about John Hardin

Name:John Hardin
Service Info.:CONTINENTAL LINE REVOLUTIONARY WAR Birth
Birth Date:2 Jun 1733
Death Date:2 Jun 1803
Cemetery:Hardin Family Cem Cemetery
Address:Morris Cross Roads, Lemont Furnace, Pennsylvania 15456

This is the Find a Grave oage for John Hardin's grandmother: https://www.findagrave.com/memorial/234391263/mary-hardin