Dorothy Michaelis Theomin (December 24, 1888 – October 11, 1966) was a New Zealand philanthropist, mountaineer, and photographer.
In 1907, she took charge of managing the family's residence, Olveston, as her mother was busy with philanthropic work.
[2] Later in life, Theomin engaged in philanthropic activities, participating in the Plunket Society and assisting the Red Cross during World War II by sending food parcels and letters of encouragement to prisoners of war.
[1][2] Theomin died at Olveston in 1966 and was buried in the family plot in Dunedin Southern Cemetery.
She bequeathed the family property to the citizens of Dunedin and in 1967 Olveston was opened for guided tours.