Hi Anna,
My husband is also a descendant of the von Tunzelmann's from Queenstown. His Great Grandmother was Constance Lilly von Tunzelmann who married William Stafford Northcoat. They lived in the Glenorchy area. There has been a family tree done by somebody who lives up north but I don't have the name of them. From what my mother-in-law has told me. Apparently Nicholas von Tunzelmann's family was in the Tzar's white army and at the time of the russian revolution he was exiled from Russia and escaped to England and then onto NZ. There is more to the story etc but just can't remember it at the moment. I do have photos somewhere here of Constance Lilly, Nicholas Paul Balthasar Tunzelmann von Alderflug (Von Tunzelmann), and Gertrude Rose Von Tunzelman
nee Gilbert d 21/4/1918. I would be interested to hear of any info you have on this family
Kind Regards
Vanessa