Related Information for A.b. Quintanilla Iii Abraham Isaac "A.B." Quintanilla III (born December 13, 1963) better known as A.B., is an American songwriter, record producer and musician. He is the older brother of "The Queen of Tejano music" Selena. Along with Selena, his other sister Suzette, and his father Abraham, he became a member of Los Dinos in 1980 which would later include Selena's husband Chris PĂ©rez as a guitarist. As a member of Los Dinos, A.B. would play bass guitar, produce and write songs for Selena.. read more