In the entire world, Robert Antonio (Robert Antonio 
) is a rare masculine forename. The forename Robert Antonio is habitual in Aland Islands, where it is quite a common male name, Costa Rica, where it is quite a rare masculine name, and the Dominican Republic. In absolute terms, it is commonest in Latin America and the Caribbean, particularly Peru, Chile, and the Dominican Republic. Very seldom, Robert Antonio is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Robert Antonio | Costa Rica, Chile, Dominican Republic, Ecuador, Peru |
Mora, Garcia, Vargas, Morales, Salazar, Alvarez, Aguilar, Barrera, Ramirez, Delgado, Herrera, Alvarado, Bautista, Gonzalez, Espinoza, Valverde, Olivares, Rodriguez, Gutierrez, Fernandez, Montenegro, Aedo Perez, Rivera, Campos, Castro, Muñoz, Soto, Cruz, Ruiz, Diaz, Leon, Luna, Jara, Vega, Salas, Silva, Molina Orellana, Arias, Claro, Perez, Ponce, Rojas, Gomez, Leiva, Lopez, Maties, Moreno, Molina, Cerna, and Ibarra Sanchez