i want know these surname Zátopek, Louganis, and Théato. these athletes are famous for the olympic games, so i had surfed any surname meaning sites for search these surnames, But I didn't get the correct answer.
first, Emil Zátopek, from the Czechoslovakia. who was got the gold medal at the 1948~1954 for the marathon.
second, Michel Théato, from the luxembourg. who was got the gold medal at the 1900. (And I was confused that what is Théato's origin, Luxemburgian variant or original french)
and last, Greg Louganis, greek-american, who was got the gold medal at the 1988 for swimming, and i want to know what his adopted surname 'louganis' means.
If somebody know the meaning of these surnames, please respond it.