Célestine Ann "Tina" Knowles (née Beyincé; born January 4, 1954) is an American fashion designer known for her House of Deréon and Miss Tina by Tina Knowles fashion brands. She is perhaps best known as the mother of singers Beyoncé Knowles and Solange Knowles, and was the wife of Mathew Knowles, who managed Destiny's Child and then Beyoncé and Kelly Rowland until 2011.