Hugo Tetrode died in 1931.
Hugo Tetrode was born in 1895.
Tetrode original paper: Die chemische Konstante der Gase and das elementare Wirkungsquantum I don't know about Sackur
A tetrode is an electronic tube with four electrodes; cathode, grid, screen, and plate.
Hugo Stenlund died in 1977.
Hugo Michielsens died in 1957.
Hugo Eywo died in 1953.
Hugo Kraus died in 1961.
Hugo Lehner died in 1952.
Hugo Lederer died in 1940.
Hugo Österman died in 1975.
Hugo Eberhardt died in 1959.
Hugo Bruckmann died in 1941.