Cognomen Willenbrock (Willenbrock 
) , worldwide, is quite a rare surname. The last name Willenbrock is characteristic of Germany, where it is a rare surname, Belgium, where it is a very rare surname, and the United States. Not in comparison with a country's population, this name is the most popular in Germany, the United States, and the United Kingdom. Much less frequently, Willenbrock is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Willenbrock | Belgium, United Kingdom, United States, Germany, Australia |
| johann willenbrock German physician, PL (b. 1531) |
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| jamie willenbrock German association football player, DE |
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| scott steven willenbrock Ph.D. University of Texas at Austin 1986 |
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| jörn willenbrock |
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Mr, Paul, Pete, Ralf, Rolf, Ryan, Dara, Gerd, Glen, Leon, Lisa, Lynn, Jane, Jack, John, Joan, Judy, Tara, Nick, Nina, Elke, Eric, Kami, Earl, Karl, Brad, Ms, Jo, Ana, Amy, Pat, Ron, Jan, Joe, Jin, Tad, Tom, Zoe, Mary, Mark, Alex, Alan, Anna, Anne, Arne, Carl, Cara, Bill, and Hans