The son of Jacob & Susanna Weary (Wearry in the 1850 census), in 1860 he was living with his family farming in North Middleton Township, Cumberland County, Pennsylvania.

He may have been drafted in Carlisle October 16, 1862, but given that he was not yet eighteen years of age (despite declaring he was), it is more likely he enlisted as a substitute. Unfortunately, his compiled military service record is mum on this issue. However he got there, he mustered into federal service at Camp McClure, Chambersburg, November 1, 1862, and honorably discharged with his company August 12, 1863.

He married Margaret (Martha in several of her children's death certificates) Rebecca "Beckie" Kriner December 15, 1869, in Carlisle, and fathered Laura Eby (b. 02/12/72 - married Ralph C. Crow), Minnie Florence (b. 12/21/73 - married Jacob Calvin Waggoner), William Henry (b. 01/28/75, d. 02/05/75), Ida May (b. 05/11/76 - married Alfred Clayton Swarner), Anna Rebecca (b. 04/05/78 - married Phillip W. Snyder), Emma Linda (b. 10/21/79 - married Edward Henry Hunt), Edward Walter (b. 03/29/81), Franklin Monroe (b. 05/27/83), Bessie Belle (b. 10/23/85 - married Warren Krise Wickard), Grace E. (b. 06/06/88, d. 03/31/89), Carrie Elsie (b. 04/02/90 - married Roy Ernest Jacoby), Edna Rhoda (b. 06/20/92 - married John Henry Boyer), and Lawrence David (b. 01/09/96). Beckie died in 1896, apparently from the effects of childbirth, and he married Anna E. Mell November 27, 1903, in Camden, New Jersey.

In 1899, he lived in Caprivi, Cumberland County.

Info from Dennis Brandt:
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The Star and Enterprise (Newville, PA )Saturday, January 8, 1870; pg. 2

MARRIED.

WEARY - KRINER. - On The 15th inst., at the Parsonage North St., Carlisle, by the Rev. J. Hunter, Mr. David Weary, to Miss Margaret Kriner, both of North Middleton twp.
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The Sentinel (Carlisle, PA), Saturday, November 26, 1927; pg. 5

David Weary, a lifelong resident of North Middleton township, died suddenly this morning at 6 o'clock at his home, in his 83rd year. His wife and eleven children survive. Funeral arrangements will be announced later.
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The Sentinel (Carlisle, PA), Monday, November 28, 1927; pg. 7

Funeral services for David Weary, North Middleton, who died Saturday morning at six o'clock, will he held at 10 o'clock tomorrow morning at the house, where brief funeral services will be held and further services will be held in Lower Frankford Stone Church. Friends and relatives are invited.

Mr. Weary, although in declining health was able to be about the house Saturday morning, and his death was rather unexpected. He was 73 years old. He was a veteran of the Civil War, having soldiered in Company C of the 15th Pennsylvania Volunteer Infantry. He and his comrade, Moses Wetzel of Illinois were the only two surviving members of the company. He was a member of Post 201 G. A. R., Carlisle.

Mr. Weary is survived by his wife, and the following children, Mrs. Ralph C. Crow, of Lemoyne; Mrs. J. C. Waggoner, of Carlisle Springs; Alfred C. Swarner, Oregon; Mrs. Philip Snyder, North Middleton; Mrs. Emma Hunt, Philadelphia; Edward Weary of New Jersey; Mrs. Roy Jacoby Etters; Mrs. John Boyer, Illinois; Lawrence of Dickinson and Frank and Bessie at home.

He is also survived by 30 grandchildren and five great grandchildren. Former Prothonotary Daniel Weary, of Middlesex and Wilson Weary, of North Middleton, are brothers and Mrs. John Eslinger of Dickinson is a sister.