Cognomen Douglas (Douglas 
, Дуглас 
, دوغلاس 
, among others...) , across the world, is a widespread family name. The family name Douglas is characteristic of Latin America and the Caribbean, particularly Grenada, where it is a common surname, Saint Kitts and Nevis, and Jamaica (explore the name in all countries). Measured by absolute frequency, it most frequently occurs in the United States, the United Kingdom, and Venezuela. More frequently, Douglas is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Douglas | Venezuela, Brazil, United States, Kenya, United Kingdom |
| Дуглас | Ukraine, Russia, Kazakhstan, Armenia |
| دوغلاس | Iraq |
| דאגלס | Israel |
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bricius de douglas Scottish bishop, GB (b. 1101) |
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| william i of douglas Scottish noble (b. 1101) |
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william le hardy of douglas Scottish nobleman and warlord, GB (b. 1243) |
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| william longleg of douglas Scottish noble (b. 1220) |
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james douglas Scottish knight, GB (b. 1286) |
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| hugh douglas of douglas (b. 1250) |
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| hugh douglas of douglas Scottish noble, GB (b. 1294) |
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| william douglas, lord of liddesdale Scottish nobleman and soldier, GB (b. 1300) |
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james douglas Scottish noble, GB (b. 1358) |
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james douglas, 7th earl of douglas Scottish noble, GB (b. 1371) |
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| william douglas, 1st earl of douglas Scottish noble, GB (b. 1330) |
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| george douglas Scottish noble, GB (b. 1380) |
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| william douglas (1390-1425) (b. 1390) |
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| william douglas, 2nd earl of angus Scottish nobleperson, GB (b. 1398) |
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| isabel douglas, countess of mar Scottish noble (b. 1400) |
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Cruz, Vieira, Wilson, Martins, Machado, Santana, Almeida, Andrade, Barbosa, Pereira, Ribeiro, Johnson, Freitas, Anderson, Carvalho, Campbell, Thompson, Ferreira, Oliveira, Williams, Rodrigues, Goncalves, Taylor, Araujo, Soares, Santos, Rosa, Reis, Dias, Lima, Moore, Silva, Sousa, Souza, Smith, Alves, Fernandes, Costa, Brown, Rocha, Davis, Gomes, Lopes, Jones, Jesus, White, Martin, Miller, Clark, and Nascimento