Justus Eakin was born near Berkley Springs, Virginia, now West Virginia. His father, William, migrated before 1800 to the Greensboro area of Greene County where Justice married Mary Myers, daughter of Peter and Mary Hibbs Myers about 1817 at Garrard's Fort, Pennsylvania. Justice is first found in Greene County in the 1808 tax records for Wayne Twp. (Gilmore Township was formed after 1850.) He also owned land in the Wadestown area of West Virginia about 10 miles from Jollytown and lived there in his early married life as all of his children were born in Monongalia County, Virginia. Some of his land holdings, (over 2,000 acres), may have been inherited from his wife's father, Peter Myers. Some biographies list his trade as that of a "cooper".
Justus died at age 85 while living at Jollytown, Pennsylvania. He is buried in Gilmore Township, Greene County, Pennsylvania at the Eakin Cemetery. A marker on his grave indicates that he was a veteran of the War of 1812. Mrs. Patterson, great-great granddaughter, has possession of his commission. Frank Jones, of Greene County, in his compilation "Soldiers Memorial of all Wars, 1776-1939" listed Justice Eakin as a veteran of the War of 1812.
From a family sketch of his grandson, Clement L. "Justus Eakin, grandfather, was born at Greensboro, but when a young man removed to Wadestown, where he became a large land-owner, having about two thousand acres, and was an extensive and prosperous farmer. He died at Jollytown, Greene County, Pennsylvania. He married Mary Myers, of Garrard’s Fort, Pennsylvania, and they became the parents of ten children, six boys and for girls, of whom Justus, father, was the fourth, in order of age. A brother of his wife, John Myers, was a wagon-master in the War of 1812".