Surname Robert Allan (Robert Allan 
) , in the world, is an extremely rare family name. The family name Robert Allan is habitual in Latin America and the Caribbean, particularly Chile, where it is a very rare surname. Much more frequently, Robert Allan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Robert Allan | Philippines, Ireland, Australia, Canada, Sweden |
Sia, Medalla, Miranda, Simmons, Stewart, Alcazar, Arabejo, Bolista, Dalisay, Galanay, Vicente, Factora, Untivero, Martinez, Anderson, Cadungog, Bautista, Desierto, Drysdale, Espinosa, Espiritu, Cristobal, Ortega, Valdez, Paneda, Conant, Lee, Que, Cruz, Pesa, Gana, Jota, Ople, Wall, Sioco, Scott, Dela Cruz, Arcon, Borja, Braga, Bucks, Perez, Dungo, Lloyd, Tubal, Yraola, Arieta, Cajang, Cairo, and Dimaranan