Abraham Quintanilla, the father of late singer Selena Quintanilla, has died. He was 86. "It's with a heavy heart to let you guys know that my Dad passed away today...," the late singer's brother, Abraham "A.B." Isaac Quintanilla, wrote via Instagram on Saturday, December 13, announcing his father's death. Abraham's son also shared a photo of his father, wearing rose-colored sunglasses. The cause of death has not been made public. Selena's father married her mother, Marcella Quintanilla, in June 1963. In addition to their famous daughter and A.B., the pair also welcomed daughter Suzette.