Henry Denis Hauenstein, MM (3 May 1881 – 6 December 1940)[1] was an Australian national representative rower and a World War I infantry officer.

Carl failed in his attempt at gold prospecting, then worked as a carpenter and coach driver whilst struggling to farm a 319-acre dry landholding.

[3] Hauenstein became the Leichhardt club's first eight-oared state representative, rowing in the New South Wales men's eight at the Interstate Regatta for five consecutive years from 1907 to 1911.

[3] In 1912 he was a member of the Australian men's eight which racing as a Sydney Rowing Club entrant, won the Grand Challenge Cup on the River Thames at the Henley Royal Regatta.

The citation read:[12]At Pozieres, France 15th to 22nd August 1916 Cpl Hauenstein was engaged in the frontline construction in the direction of Ferme Mouquet having one night's sleep only.

Cpl Hauenstein is a man of great physical strength and repeatedly left the trenches going to shell craters and carrying in wounded men under fire when but for this they must have remained.