When we got married My wife wanted to keep here family name.  The reason for this was she has so many documents that it would take months to years to change everything.  I agree.  There no problem anywhere else in the world.  But I would like to know if there is any requirement that my last name must be on KR 1,2, 3.

There is no requirement for your wife to take your name. Prior to 2002 she would of had to take your name.

Not sure what a KR 1 is. But the Kor Ror 3 marriage certificate would always show her maiden name and the Kor Ror 2 marriage registry could show both or either name.

Immigration, embassies and consulates certainly do not care either way.

Thank you joe.  One less thing to worry about.