Ed Koch's birth name is Koch, Edward Irving.
Heinrich Koch's birth name is Heinrich Georg Koch.
Eik Koch's birth name is Eik Koch Snchen.
Garrison Koch's birth name is Garrison Anthony Koch.
Jay Koch's birth name is Julius Koch Jr..
Ralf Koch's birth name is Ralf Karl Koch.
Rod Koch's birth name is Rodney Allen Koch.
Federico Koch's birth name is Federico Ral Koch Valenzuela.
Hawk Koch's birth name is Howard Winchel Koch Jr..
Ilse Koch's birth name is Ilse Khler.
Andre Koch Assis's birth name is Andr Koch Torres Assis.
Not only are they not related, but they say their last name differently. The former mayor of New York, Ed Koch, says it to rhyme with "watch." Charles Koch, of the Koch brothers, pronounces his name to rhyme with "stroke."
Erland von Koch's birth name is Erland Sigurd Christian Jag Vogt von Koch.