Cognomen Yapp (Yapp 
, ياب 
) , all around the world, is quite a rare last name. The cognomen Yapp is characteristic of Brunei, where it is quite a common surname, Isle of Man, where it is quite a rare surname, and Malaysia. Measured by absolute frequency, it is the most numerous in Malaysia, the United Kingdom, and the United States. Very seldom, Yapp is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Yapp | Malaysia, United Kingdom, Australia, United States, Indonesia |
| ياب | Sudan, Egypt, Iraq |
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richard henry yapp British botanist (1871-1929), GB (b. 1871) |
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cecil yapp American actor (1879-1959), US (b. 1879) |
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| arthur yapp young people's welfare organizer, GB (b. 1869) |
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| w. b. yapp English zoologist, GB (b. 1909) |
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| malcolm yapp British historian, GB (b. 1931) |
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| stan yapp English politician, GB (b. 1933) |
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| nick yapp GB (b. 1938) |
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| john yapp British diplomat (-1951). High Commissioner to the Seychelles 1998-2001, High Commissioner to Belize 2007-2009 (b. 1951) |
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| jake yapp British comedian (b. 1973) |
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| darren yapp English rugby union footballer, GB (b. 1975) |
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| joanne yapp English female rugby union player, GB (b. 1979) |
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| nicola jane yapp Peerage person ID=557134 |
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| edward k.y. yapp researcher ORCID ID = 0000-0002-2315-3152 |
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| liam yapp researcher |
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| clarence yapp researcher, CA |
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