[4] John Jacob Doub (aka Jacob) (February 27, 1744 – 1824) was born in Minfeld, and moved to the new world with his parents, John Nicholas Doub and Anna Maria König.
Several early Doubs were active land speculators in Frederick, and their names are mentioned on many colonial-era deeds.
Jacob Doub married Louisa Bowlus (Paulus) (February 2, 1750 – December 30, 1817), who was born in Frederick Co., Maryland, daughter of Andreas Bowlus and Anna Maria his wife, and who died at Middleton, Frederick Co.[2] Together they had seven sons, and two daughters, Rosanna and Catherine:[5] Maryland Doub family members were active in the taming of the Western Maryland frontier, and played a prominent role in the agriculture, economy, and politics of Washington County, Maryland, from the earliest days of the county.
An Ezra Doub ran for the Maryland legislature in 1841 on the Whig ticket, and lost.
Another Doub family farm in Boonsboro, Maryland, was reportedly used as a field headquarters during the Battle of Antietam; the family had fled the battlefield and taken refuge in the western Maryland hills.