Harry Max Ohlhaut was born in Ohio to German immigrants. His father, Martin Ohlhaut, was a piano musician who wrote Wandering At Night (Nachtwanderlin) and St. Frances College March. Harry Max Ohlhaut was also a piano player: he wrote Love Is A Wonderful Dream and worked at the Baldwin Piano Company in Cincinatti, Ohio.
On April 27, 2942, Harry Max Ohlhaut was registered into the US Military for WWII.
His son, Harry R Ohlhaut, also served in WWII.