Sur 13 is another name for the Sureños
(Spanish for "Southerners"), a group of Mexican
American street gangs with its origins in the oldest
barrios of Southern California. Sur 13 also stands
for "Southern United Raza." Raza is Spanish for "Race." The Number 13 stands
for the letter "M," paying homage to the Mexican
Mafia Aka La Eme.