Bror Tamm (1890-1981) was the youngest of six children born to Danish parents Anton and Henriette Splittorff Tamm in Elsagaarden, Blentarp, Sweden. As a young boy on his family's estate in Sweden, the Tamm family associated with King Karl XIV and King Oscar II. Instead of going to university, Tamm chose to be apprenticed to shipwright A.K. Gustafson in Landskrona, Sweden. He then worked in a yacht yard in Nyborg, Denmark as a carpenter, draftsman, and naval architect for two years until he was 19, designing 45 different types of fishing vessels during his short time there. Tamm traveled to the United States in 1911 where his brother, Flemming, was already living in Paris, Maine.

Bror moved to Quincy, Massachusetts and accepted a job with the George Lawley & Son Corporation in Neponset, Massachusetts in April, 1912 as a yacht carpenter. In 1930 Tamm was named superintendent of the shipyard and head of the spar and rigging department. While at the yard, he worked on famous yachts like YANKEE (Sloop) and WHIRLWIND (Sloop). He was assistant general manager of the Lawley yard from 1938 until the yard closed in 1947. Tamm was an expert yacht designer and was constantly inventing and improving upon all types of boats and rigging components. He is credited with creating over 80 different inventions while at Lawley's, like his patented roller reefing gears. He built and designed boats for his friends and himself after the Lawley yard closed.

He became seriously ill in 1952 but recovered and published articles on boat building and corresponded with the experts of the times. He worked and developed friendships with many well-known individuals including Frank C. Paine and L. Francis Herreshoff. He was married to Frieda Johnson and they had a daughter named Edna. Edna attended the Katherine Gibbs School and worked as a secretary to Professor Caldwell at the Massachusetts Institute of Technology. She married Frank Verzuh October 22, 1955. Tamm suffered a debilitating stroke in 1972 and died as the result of a second stroke on September 19, 1981. Edna Tamm Verzuh passed away on July 16, 2000.