Hieronymus Heyerdahl (1867–1959)

Hieronymus Heyerdahl (5 May 1867 – 13 January 1959) was a Norwegian lawyer, administrator and politician for the Conservative Party, born in Fredrikstad. His parents were Hieronymus Heyerdahl (1832-1876) and Henriette Sophie Schou(1839-1929). He married Anna Wilhelmine "Minka" Weidemann (1869-1956) in 1893.

He served on the City Council and as mayor of Oslo from 1912 to 1914. He developed the plans to build a new City Hall and has therefore been called the "Town Hall's father". He was president of the Norwegian Red Cross from 1917 to 1922.