Research has shown that the bearers of the surname Dammann previously inhabited the modern state of Lower Saxony, in the region of Oldenburg. Now bordered by the North Sea, the Hartz mountains and the Elbe and Ems river.
In the Middle ages the Dammann family settled in Oldenburg, where the name emerged in mediaeval times as one of the notable families of the region. From the 13th century the surname was identified with the great social and economic evolution which made this territory a landmark contributor to the development of the German nation.
Research shows that the name Dammann underwent changes,scribes often recorded names as they sounded, due to different regional dilects many spellings occured, often between generations. Among the different variations were Damann, Daman and Damm to show a few examples.
While living in Oldenburg they continued to be an important contributor to the life of Europe in the Middle Ages. From the 16th century onwards the name branched to Brandenburg, Pomerania, Silesia and even France and Belgium. The name spelled as Damm was associated with an ancient patrician family and lived in the city of Brunswick. They held significant positions of prestige and power becoming involved in the racial and tribal struggles for supremacy. They became allied with many notable houses including the Viscounts of Herines in Tournai. Notables of the time were William Daman (1540-1591) who was a composer influential in England at Queen Elizabeths court.
After 1650 many Germans left their homeland for the New World. In the U.S. they settled mainly in Pennsylvania, New York,Ohio,California and Illinois. In Canada, German settlements centered around Ontario and the Prairies. Settlers bearing the name Dammann include Edward Daman (settled in Philadelphia 1859) John Daman (settled in Philadelphia 1773) and John F Damann (settled in Philadelphia in 1844)
Notable figures of the modern period were Gustav John Dammin (1911) who was a prominent professor of pathology and medicine at Harvard. He was decorated with the legion of merit, the legion of merit with oak leaf cluster, the Walter Reed Medallion(1971) and the Meritorious Service Award of the Armed Services.