Rubuta ci gaba don wannan sakin layi - Joop Demmenie (19 ga Disamba 1918 <unk> 3 ga Yuni 1991) ya kasance mai hawan keke daga Netherlands. Bayan da ya gama na huɗu a tseren hanya mai son a 1937 UCI Road World Championships, ya lashe lambar tagulla a 1938 UCI Road World Championships
a tseren titi na maza masu sha'awar. Ya kasance ƙwararren ɗan tseren keke tsakanin 1939 da 1948. A shekara ta 1939 ya lashe Brussel-Hozémont.