Célestine Ann Beyincé (born January 4, 1954), known as Tina Knowles, is an American businesswoman and fashion designer known for her House of Deréon and Miss Tina by Tina Knowles fashion brands. She is the mother of singers Beyoncé and Solange Knowles, and was previously married to Mathew Knowles, the manager of Destiny's Child as well as Beyoncé and Kelly Rowland until 2011.