Celestine Ann "Tina" Beyoncé Knowles is an American businesswoman, fashion designer, author, and philanthropist known for establishing the brands House of Deréon and Miss Tina by Tina Knowles. She is the mother of singers Beyoncé and Solange Knowles and was married until 2011 to their father Mathew Knowles, the manager of Destiny's Child. For her contribution to the fashion business, Knowles was honored at the Accessories Council Excellence Awards in 2001.