Cognomen Regiani (Regiani 
) , in all the world, is quite a rare last name. The surname Regiani is habitual in Brazil, where it is a rare surname, Indonesia, where it is a very rare surname, and Argentina. Not in comparison with a country's population, it is commonest in Brazil, Indonesia, and Italy. Also, Regiani is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Regiani | Argentina, Italy, Brazil, United States, Indonesia |
| joao luiz agner regiani politician from Brazil, BR (b. 1967) |
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| ruth moreira de sousa regiani researcher at the University of Brasilia |
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| atila ribeiro regiani researcher at the University of Brasilia |
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