Cognomen Chad (Chad 
, ชัด 
, 查德 
, among others...) , in the world, is a common family name. The family name Chad is characteristic of Aland Islands, where it is quite a common surname, Libya, where it is quite a rare surname, and Oman. Not in comparison with a country's population, it is commonest in Bangladesh, India, and the United States. Much more prevalently, Chad is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Chad | Australia, Bangladesh, India, Canada, United States |
| ชัด | Thailand |
| 查德 | China |
| تشاد | Iraq, Libya, Sudan, Saudi Arabia |
| チャド | Japan |
| Чад | Ukraine, Russia |
| צ'אד | Israel |
| Чед | Ukraine |
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george william chad British diplomat (b. 1784) |
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| robert john chad (1778-1793) (b. 1778) |
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václav chad Czech painter (1923-1945), CZ (b. 1923) |
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norman chad American sportswriter, US (b. 1958) |
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| john chad Canadian ice hockey player (1919-1970), CA (b. 1919) |
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| jason chad actor (b. 1950) |
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nesryne el chad Moroccan footballer, FR |
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| dominic chad English rock guitarist and songwriter, GB (b. 1972) |
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| lauren chad researcher (ORCID 0000-0003-0468-6663) |
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| t. e. chad Peerage person ID=422687 |
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| ben chad D. Phil. University of Oxford 2011 |
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| robert chad Peerage person ID=213629 |
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| john chad researcher |
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| charles souza chad Brazilian footballer, BR (b. 1981) |
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| carlos chad |
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Lee, Rogers, Taylor, Thomas, Turner, Nelson, Harris, Walker, Wilson, Wright, Stewart, Collins, Roberts, Jackson, Johnson, Edwards, Mitchell, Anderson, Campbell, Peterson, Phillips, Robinson, Parker, Cooper, Carter, Miller, Cook, King, Hall, Hill, Moore, Scott, Smith, Allen, Adams, Clark, Thompson, Baker, Davis, Green, Lewis, Jones, Evans, Olson, White, Young, Martin, Morris, Brown, and Williams