Cognomen Sisam (Sisam 
) , globally, is quite a rare family name. The cognomen Sisam is habitual in New Zealand, where it is quite a rare surname, Israel, where it is a rare surname, and Algeria. Measured by absolute frequency, the name is most common in India, Algeria, and the United States. Also, Sisam is the forename as well as the last name.
| charles herschel sisam American mathematician, US (b. 1879) |
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| kenneth sisam New Zealand academic and publisher (1887–1971), NZ (b. 1887) |
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| john william bernard sisam professor of forestry (b. 1906) |
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| peter james sisam English photographer and film-maker (1914-2015), GB (b. 1914) |
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| celia sisam British scholar, GB (b. 1926) |
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| dave sisam college basketball player (1955–1955) Drake |
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| patrick sisam |
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