Cognomen Callais (Callais 
) , in the entire world, is quite a rare surname. The cognomen Callais is characteristic of France, where it is a rare surname, the United States, and New Zealand, where it is a very rare surname. Measured by absolute frequency, it is commonest in the United States, France, and Brazil.
| VARIANT | COUNTRY |
|---|---|
| Callais | France, Canada, Brazil, United States, New Zealand |
| jean-pierre callais French politician, FR (b. 1959) |
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| simon callais French politician, FR (b. 1959) |
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| patrick callais French politician, FR (b. 1963) |
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