Cognomen Cashman (Cashman 
) , worldwide, is quite a common family name. The surname Cashman is habitual in Ireland, where it is quite a common surname, Australia, where it is quite a rare surname, and the United States. Measured by absolute frequency, it is commonest in the United States, Ireland, and the United Kingdom.
| VARIANT | COUNTRY |
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| Cashman | United Kingdom, Australia, Ireland, United States, Canada |
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ellen cashman American gold prospector, IE (b. 1845) |
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harry cashman American actor, US (b. 1869) |
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mel cashman union organizer and arbitration inspector (1891-1983), AU (b. 1891) |
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| denis cashman Fenian transported to Australia, IE (b. 1842) |
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jack cashman Australian rules footballer and coach (1906-1982), AU (b. 1906) |
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| john e. cashman American politician, US (b. 1865) |
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| thomas e. cashman American politician – Minnesota -Senate 1907-14 (District 8), US (b. 1871) |
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| michael richard cashman, sr. American politician – Minnesota -- "M.R." Senate 1935-42 (District 16), US (b. 1875) |
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peter l. cashman American politician, US (b. 1936) |
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| joseph cashman (b. 1881) |
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| john cashman American basketball player-coach, US (b. 1892) |
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wayne cashman Canadian ice hockey player, CA (b. 1945) |
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michael cashman British politician (born 1950), GB (b. 1950) |
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katharine cashman American volcanologist, US (b. 1954) |
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| robert j. cashman American academic, US (b. 1906) |
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