Dame Gwynneth Frances Dietlinde Knowles DBE (born 11 July 1962), styled Mrs Justice Knowles is a British High Court judge of the Family Division.

[2][3] Born in Oxford, Knowles attended Southill Sixth Form College.

[4] She was called to the bar in 1993 and was appointed King's Counsel in 2011.

[5] In 2017, she was appointed as a High Court judge and assigned to the Family Division.

[7] She received the customary damehood from Elizabeth II in the same year.