Celestine Ann "Tina" Beyincé-Lawson (born January 4, 1954) 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 is the ex-wife of Mathew Knowles, the manager of Destiny's Child as well as Beyoncé and Kelly Rowland until 2011.