Cognomen Zaff (Zaff 
) , in the world, is a rare surname. The surname Zaff is habitual in Israel, where it is a rare surname, Austria, and Switzerland. Measured by absolute frequency, it is commonest in Indonesia, the United States, and Israel. Much less frequently, Zaff is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Zaff | Indonesia, Austria, United States, Myanmar, Israel |
| nicolaus zaff der ältere Swiss theologian, CH (b. 1620) |
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| saturnin zaff Swiss theologian, CH (b. 1636) |
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| david benjamin zaff Ph.D. Massachusetts Institute of Technology 1987 |
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| karl zaff SE |
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Ms, Zura, Ziva, Moose, Sarah, Sakis, Susan, Alice, Chris, Basil, Betty, Brian, David, Laura, Linda, Lukas, Habsa, Zafri, Zafer, Zaffy, Sandra, Stacey, Iris, Andrea, Eric, Toni, Ale, Rob, Dan, Ori, Mark, Matt, Mike, Alan, Anna, Anne, Amin, Adam, Chlo, Carl, Braf, Paul, Rita, Gail, Greg, Josh, John, Elen, and Andrew