Cognomen Casahuamán (Casahuamán 
) , in all the world, is an extremely rare last name. The family name Casahuamán is habitual in Latin America and the Caribbean, particularly Peru, where it is an extremely rare surname. Likewise, Casahuamán is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Casahuamán | Peru |