I have a Biermann family in my family history, althouggh they are not directly related. Helen Biermann was adopted by my Aunt, Mabel Hammond, and her husband, Percy, in the 1920's. They had come to Bermuda around 1911 with the Governor. Percy was a Gentleman's gentleman. Helen's family stayed in touch and in the 1970's we visited Mabel and stayed at Ferry Reach, which was owned by the Biermann family. Unforunately we lost touch with the family after Mabel died. If you think this is any relation let me know and I will try to unearth more info.