Jonas Bowen was in Baltimore County by 1673 when "Jonas Chance" was surveyed 20 May 1673 for Jonas Bowen. . In 1676 When Jonas Boyen purchased from William and Jane Ebden, the 100 acre tract "Gooseberry Neck". Also in the Patapsco Hundred of Baltimore Co was "Jonas Out Lett" surveyed 12 May 1689 for Jonas Bowen, "Jonas Addition" 51 acres surveyed 20 Aug 1687 for Jonas Bowen, The will of Lewis BRYAN of Baltimore Co (dated 31 Jan 1676/77 names Elizabeth daughter of Jonas Bowing and heirs as executrix and residuary legatee of the estate and 100 acres "Bryan's Forest" on Back River. , with Jonas Bowing and Nicholas Corbin named as witnesses. It is believed that Jonas was first married to a daughter of Lewis Bryan and had issue Elizabeth. Jonas was married second, to Martha, the widow of Laurence WOODEN The will of Nathaniel HENCHMAN of 20 Oct 1694 names Lawrence Walder, Samuel of Amos Evans, Mary Green, Rebecca Bowen daughter of Jonas Bowen and child of wife Margaret, Benjamin Bowen Because of this will it is thought that Margaret may have been the sister of Nathaniel Henchman.
What relationship exists between early Bowen settlers of MD is not proven. There was a Samuel Bowen in Baltimore Co. ca. who witnessed a deed of John Wheeler in 1671 and the will of Henry Jones in 1670. Also there is the Bowen family of Calvert Co. to whom some linkage has been claimed.