Last name Sixto Domingo (Sixto Domingo 
) , throughout the world, is a very rare family name. The surname Sixto Domingo is habitual in Spain, where it is a very rare surname, and Chile. More prevalently, Sixto Domingo is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sixto Domingo | Peru, Argentina, Spain, Chile, Ecuador |