Cognomen Callman (Callman 
) , in the entire world, is a very rare surname. The last name Callman is characteristic of the United Kingdom, where it is a very rare surname, the United States, and Nigeria, where it is an extremely rare surname. Likewise, Callman is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Callman | Nigeria, Canada, United Kingdom, United States, South Africa |
| charles s. callman American politician, US (b. 1917) |
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| clive callman British judge (1927-2019), GB (b. 1927) |
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