Gerson G Koppenhagen to William Korff - 1911 Census household returns
- Gerson G Koppenhagen
- Henry Koppenhagen
- Jacob Koppenhagen
- Leon Koppenhagen
- Leon Koppenhagen
- John Henry Koppenhoefer
- Carl Kopper
- John F Koppermann
- Louise Koppke
- Jacob Kopple
- Simon Kopple
- Ada Koppleman
- Davis Koppleman
- Louis Koppleman
- Sophie Koppleman
- Emil Koppner
- Rudolph Kopps
- Jules Koprek
- Guston Ferdenand Kopreske
- Barnet Koprofski
- Frank Koprouski
- Charles Kops
- David Kops
- Alfred Richard Kopsch
- Ernest Kopsch
- Karl Kopsch
- Richard Kopsch
- Isaac Kopshinsky
- Lewis James Koptick
- Daniel Kopuit
- George Kopvit
- Samuel Kopytko
- William A Dean Korachick
- Zara Koral
- Lewis Koransky
- Morris Koransky
- Elizabeth Korb
- Christian Korber
- Heinrich Herman Oswald Edmund Korber
- Woolfe Korbetov
- Otto Korbs
- Charles Korck
- Alfred George Kordian
- Amalie Kordik
- Josef Oscar Kordina
- Michael Kordon
- Samuel Klein Kordy
- Abraham Koren
- David Koren
- Gertie Korer
- Israel Koretz
- Herman Korf
- Rebecca Korfer
- Mary Korff
- William Korff