Namesakes
Nobel Prize Winners:
1 chemistry
(chemistry) Karl Ziegler 1963 
Notable Actors and Entertainers:
1 actor, 1 dancer/actor
Karen Black (a.k.a. Ziegler) 1939-2013
Maddie Ziegler 2002-
Notable Athletes:
1 soccer
(soccer) Reto Ziegler 1986-
Notable Scientists and Inventors:
1 chemist
Karl Ziegler 1898-1973