"Gerardus Mercator, Leo Baekeland, Georges Lemaître , Jacky Ickx, Eddy Merckx, Justine Henin"
Famous?! I have never heard of any of those before now...
Mercator -- map maker
Baekeland -- plastics
Lemaître -- the Big Bang Theory
Ickx -- race-car driver
Merckx -- no clue
Henin -- tennis player.
If you've really never heard of Mercator, you paid no attention in geography class. Really. And if you've really never heard of Lemaître, you probably didn't pay much attention in physics class, either.