Mezue ahịrịokwu na-esonụ: Joop Demmenie (19 Disemba 1918 <unk> 3 June 1991) bụ onye na-agba ịnyịnya ígwè si Netherlands. Mgbe o mechara nke anọ n'ọsọ egwuregwu amateur n'ọsọ UCI Road World Championship nke 1937, o ritere ọla nchara n'ọsọ UCI Road World Championship nke 1937.
1938 UCI Road World Championships na agbụrụ ndị nwoke na-agba ọsọ n'okporo ụzọ. Ọ bụ onye na-agba ịnyịnya ígwè ọkachamara n'etiti 1939 na 1948. N'afọ 1939, o meriri n'ọsọ Brussel-Hozémont.