Earliest Dinsmore The following is the earliest Dinsmore I can firmly attribute: A James Dinsmore (no known relation), listed as a passenger on the "Unity," out of Liverpool, made this passage and was sold into service at Saugus Iron Works in Lynn, Massachusetts in 1651. Cromwell's crusade against the Roman Catholics, as well as Episcopalians, resulted in mass migrations and the devastation of rural villages. Maybe some can make use of this factoid, I have run into dead ends. It is thought after he left Saugus Works he moved into Maine.