Cognomen Fetalvero (Fetalvero 
) , throughout the world, is quite a rare family name. The cognomen Fetalvero is habitual in Philippines, where it is quite a rare surname, United Arab Emirates, where it is a rare surname, and Singapore. Measured by absolute frequency, it is the most numerous in Philippines, United Arab Emirates, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Fetalvero | Australia, United Arab Emirates, Philippines, United States, Saudi Arabia |