He married his first cousin once removed, Ann Wallingford.(2970) John and Ann were first cousins once removed if their ancestry is reported correctly here.
Ann was born about 1818, in Berwick, York County, Maine. She was the daughter of Aaron Wallingford and Betsey Downs. (Approximate date of birth from 1850 census. Place of birth from Milton, NH Town Report record of her son Aaron's death.)
He may be the John Wallingford, age 16, born in Maine, living with Truworthy Chamberlain in Brookfield, N.H. in 1850.(2971) [It also could be John Noble Wallingford.]
Is he the John Wallingford, born in Berwick, age 23, who enlisted in the Civil War from Berwick on 17 August 1861? He joined the 3d N.H. Regiment, Company I and was mustered as a private on 24 August. He was granted a disability discharge on 22 July 1862 in Hilton Head, South Carolina.(2972)
John Wallingford and Ann Wallingford had the following child:
710 i. Calvin J.9 Wallingford was born about 1856.(2973)