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 Salus died in 1929.
Hugo Baum died in 1950.
Hugo Wast died in 1962.
Hugo Staehle died in 1848.
Hugo Clason died in 1935.
Hugo Harper died in 1895.
Hugo Reinhold died in 1935.
Hugo Gryn died in 1995.
Hugo Kaun died in 1932.