Hans Adolf Bjerrum (8 September 1899 in Hellerup, Denmark – 10 May 1979 in London, England) was a Danish field hockey player who competed in the 1920 Summer Olympics.

He later formed the Danish civil engineering company Bierrum, known for building cooling towers for power stations.

[8] Due to his work, as chairman of the Danish Club, King Frederik IX of Denmark made him a Commander of the Order of the Dannebrog in December 1963.

[10] His son (Nils) Roger was born on 16 March 1931,[11] who gained a first class degree in Engineering from Merton College, Oxford in 1957.

[12] Roger married Emily Doris Williamson in early 61, with children Stephen, Mary, Libby, Hugh and Hans.