I don't know who John's parents were, but his wife was Anna Earle, daughter of Samuel Noah Earle, III and Anna Sorrel. She also had a brother named Samuel Earle.
From:The Venturers:The Hampton, Harrison and Earle Families of Virginia, South Carolina and Texas by Virginia G. Meynard.
In 1755, Samuel Earle III sold his last remaining 200 acres of Yeocomico Plantation.The deed was witnessed by John and Anna Routt of Horn Point, once a part of Yeocomico.The Routts moved to Frederick Co. and they probably transported salves there.It is believed that Routt was Earle's overseer and that he continued in Earle's employ.In 1757John Earle took over the management of the Muddy Creek Plantation with John Routt.In 1758 Samuel Earle, Gent. of Stafford County, sold 50 acres adjoining Greenway Court where John Routt lived to Thomas Martin.