Harold William Luenstros was born in 1903 in St. Louis, Missouri. He married Elizabeth Mary Cleland and had a daughter, Jane Luenstroth, in 1940, but died that year. After retiring, Harold visited Korea with his wife in 1970 as a missionary to the Northern Presbyterian U.S.A.
At that time, Dongsan Christian Hospital invited experts from each field retired from the United States as missionaries to promote the development of the hospital. Herald came to Dongsan Christian Hospital to work on the project, worked as a financial planner, returned to the United States after three years of service, and was called by God on November 21, 1973, at the age of 70.
Harold Luenstroth engraved on the signboard of Moffett Hall at Keimyung University Daegu Dongsan Hospital