Surname Álex (Алекс 
, אלכס 
, Álex 
, among others...) , in the world, is quite a rare cognomen. The cognomen Álex is characteristic of Moldova, where it is quite a rare surname, Belarus, and Tajikistan. Measured by absolute frequency, it is commonest in Russia, Japan, and Belarus. More prevalently, Álex is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Алекс | Kazakhstan, Ukraine, Bulgaria, Russia, Moldova |
| אלכס | Israel |
| Álex | Spain, Colombia, Afghanistan, Guatemala, Dominican Republic |
| アレックス | Japan |
| أليكس | Egypt, Sudan |
Alegz, Alekos, Aleks, Alex, Alexandros, Alexios, Alexis, Alékos, Aléxandros, Aléxis, Άλεξ, Αλέκος, Αλέξανδρος, Αλέξης, Александрос, and ألكس
Ruiz, Torres, Flores, Martín, Morales, Moreira, García, Navarro, Fonseca, Sánchez, Castillo, Beltrán, Ramírez, Jiménez, Ferreira, Oliveira, Álvarez, Martínez, Rodrigues, González, Rodríguez, Gutiérrez, López, Hernández, Gómez, Román, Lima, Silva, Souza, Alves, Bruno, Perez, Ramos, Reyes, Díaz, Lopez, Junio, Vidal, Moreno, Medina, Muñoz, Santos, Sandro, Castro, Barros, Pérez, Romero, Garcia, and Fernández