Cognomen Dirac (Dirac 
, 迪拉克 
) , globally, is a very rare last name. The family name Dirac is habitual in Switzerland, where it is a rare surname, Denmark, where it is a very rare surname, and the United Kingdom, where it is an extremely rare surname. Not in comparison with a country's population, the name is most common in the United States, Switzerland, and the United Kingdom. More frequently, Dirac is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Dirac | Switzerland, Spain, United States, Taiwan, Democratic Republic of the Congo |
| 迪拉克 | China |
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paul adrien maurice dirac British theoretical physicist (1902–1984), GB (b. 1902) |
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| charles dirac (1866-1936), GB (b. 1866) |
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| gabriel andrew dirac Hungarian mathematician, HU (b. 1925) |
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| the sea of dirac podcaster |
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| margit dirac (17 Oct 1904 - certain 9 Jul 2002) |
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| hugh dirac UK medical doctor and author, GB |
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