Family name Custodio Fabian (Custodio Fabian 
) , all over the world, is an extremely rare cognomen. The cognomen Custodio Fabian is habitual in Latin America and the Caribbean, particularly Chile, where it is an extremely rare surname. Also, Custodio Fabian is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Custodio Fabian | Chile |