Gerardus Gijsbertus Siderius (11 March 1914, Amsterdam – 14 April 1990, Loosdrecht) was a Dutch canoeist who competed in the 1936 Summer Olympics. In 1936 he and his partner Henk Starreveld finished fifth in the K-2 10000 metres competition.
- Evans, Hilary; Gjerde, Arild; Heijmans, Jeroen; Mallon, Bill. "Gerardus Siderius". Olympics at Sports-Reference.com. Sports Reference LLC. Archived from the original on 2012-10-10.
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