Family name Elfo (Elfo 
) , across the world, is a very rare cognomen. The surname Elfo is habitual in Spain, where it is a very rare surname, Italy, and Venezuela. In absolute terms, it most frequently occurs in Italy, Spain, and the United States. More prevalently, Elfo is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Elfo | Saudi Arabia, Italy, Spain, Argentina, Brazil |
El, Poggio, Romero, Robles, Garcia, Llador, Torres, Negaum, El Duende, Favero, Blanco, Oscuro, Morales, Miranda, Ahumada, Lorenzi, Monteiro, Couceiro, Guerrero, Espinosa, Hernandez, Zabala, Fernández, Bianco, Sforza, Pol, Arce, Cruz, Gama, Nero, Zago, Silva, Sousa, Amann, Casmuz, Rossi, Rubio, Ditta, Lopez, Jerez, Negro, Oliva, Mendes, Medina, Satiro, Roden, and Indelicato