Family name Plan (Plan 
, Pelan , ប្លង់ 
) , worldwide, is quite a common cognomen. The family name Plan is habitual in Cambodia, where it is quite a rare surname, Slovenia, and Czechia. In absolute terms, the name is most common in France, Cambodia, and Philippines. Much less frequently, Plan is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Pelan, Plan | Philippines, India, United States, France, Indonesia |
| ប្លង់ | Cambodia |
| Planus | Brazil, Belgium, United States, France, Germany |
| benjamin du plan French Huguenot leader, FR (b. 1688) |
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pierre-charles bonnefoy du plan FR (b. 1732) |
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| alfred doneaud du plan FR (b. 1824) |
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| jean cluzel du plan French engineer, FR (b. 1848) |
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| regine plan holocaust victim, b. 1863-03-26, AT (b. 1863) |
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| pierre-paul plan French literary critic (b. 1870) |
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| henri de plan, comte de sieyes (1883-1953) (b. 1883) |
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| étienne plan French general officer and local historian, FR (b. 1896) |
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| maurice plan FR (b. 1918) |
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| francois de plan, comte de sieyes (born 1929) (b. 1929) |
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| alice plan FR (b. 1921) |
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plan b British musician and actor, GB (b. 1983) |
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| david plans researcher ORCID id 0000-0002-0476-3342 |
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| elodie l plan researcher (ORCID 0000-0002-2255-3904) |
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| yaniv plan Ph.D. California Institute of Technology 2011 |
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