Last name Phaff (Phaff 
) , throughout the world, is a rare surname. The cognomen Phaff is habitual in Netherlands, where it is quite a rare surname, Switzerland, where it is a very rare surname, and Canada. In absolute terms, this name is the most popular in Netherlands, the United States, and South Africa.
| VARIANT | COUNTRY |
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| Phaff | United Kingdom, South Africa, United States, Canada, Netherlands |
| johannes christiaansz phaff Dutch pastor in Surinam, NL (b. 1705) |
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| johannes emilius phaff Dutch painter, NL (b. 1751) |
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| carel hendrik phaff Dutch art collector, NL (b. 1792) |
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| maurits adriaan emile phaff (b. 1827) |
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hendrik johan phaff Military officer (1887-1970), NL (b. 1887) |
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| herman phaff Dutch-born American yeast researcher (1913–2001), US (b. 1913) |
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| anthoni cornelis phaff Ph.D. Technische Universiteit Eindhoven 1984 (b. 1952) |
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| jeroen phaff Dutch actor, NL (b. 1965) |
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| vanessa jane phaff British painter, GB (b. 1965) |
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| johan marie lodewijk phaff Ph.D. Universiteit van Amsterdam 1945 |
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