Family name Dederich (Dederich 
) , across the world, is a rare cognomen. The surname Dederich is habitual in Germany, where it is a rare surname, the United States, where it is a very rare surname, and New Zealand. Measured by absolute frequency, it is the most numerous in the United States, Germany, and Canada. Very seldom, Dederich is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Dederich | Germany, South Africa, United States, Canada, Brazil |
| andreas dederich German regional historian (1804-1886), DE (b. 1804) |
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| walter dederich DE (b. 1889) |
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| charles e. dederich US (b. 1913) |
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| markus dederich German university teacher, DE (b. 1960) |
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| johann vinzenz dederich |
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| dederich hornner |
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Mr, Doug, Drew, Gary, Leon, Leda, Lori, Luke, Lynn, Jack, Jake, John, Joey, Jodi, Jody, Jill, Tony, Todd, Neal, Erin, Emma, Mario, Dawn, Sally, Dana, Ruth, Ms, Amy, Ben, Ron, Roy, Dan, Lee, Jay, Jon, Jen, Jed, Esa, Uwe, Mary, Mark, Mike, Sara, Alex, Paul, Pong, Rita, Dean, and Sheri