Born before WWII? (Sure, he'd have been pretty old when his careeer ended, then...) No
European? Yes
Born before the birth of Alexandre Vinokourov? No
Has at least one member of his family also been a pro cyclist? No
Mainly a road racer? No
CX rider? No
Belgian? No
Ever been world champion? Yes
Did he retire before the time the Tokyo Olympics were supposed to have taken place? Yes
Did he, actually, retire? Yes
Ever been World Champion? Yes
Rominger? No
Shares a surname with a current contestant in an Austrian "dancing" competition? No
Almost shares a surname with a medalist from last week's EC? I assume you're referring to the Junior Women? No