Noun
a German Roman Catholic theologian who was an indefatigable opponent of Martin Luther (1486-1543)
Source: WordNetLife Johann Eck was born Johann Maier at Eck (later Egg, near Memmingen in Swabia ), and derived his additional surname from his birthplace, which he himself, after 1505, always modified into Eckius or Eccius, i.e. "of Eck". Source: Internet