Cognomen Josuan (Josuan 
) , all over the world, is a rare surname. The cognomen Josuan is habitual in Honduras, where it is a rare surname, France, and Venezuela, where it is a very rare surname. Measured by absolute frequency, it most frequently occurs in France, Honduras, and Mexico. More prevalently, Josuan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Josuan | Democratic Republic of the Congo, France, Indonesia, Puerto Rico, Bolivia |
| marcel josuan French Righteous Among the Nations, FR (b. 1899) |
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| claire josuan FR (b. 1896) |
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Hug, Garcia, Junior, Vargas, Medrano, Sanchez, Perdomo, Polanco, Ramirez, Russeau, Larisse, Estrada, Martinez, Schiavon, Denizard, Gonzalez, Oliveira, Maradiaga, Conceicao, Rodriguez, Rodrigues, Tallamini, Rivera, Romero, Suarez, Santos, Oba, Melo, Cruz, Brum, Paes, Rico, Ruiz, Dias, Lima, Neto, Ntsangoula, Vega, Souza, Arias, Conte, Reyes, Rivas, Disla, Lemus, Lopez, Moraes, Medina, Silva, and Hernandez