Ursula Frances Elinor Mommens (née Darwin, formerly Trevelyan; 20 August 1908 – 30 January 2010) was an English potter. Mommens studied at the Royal College of Art, under William Staite Murray, and later worked with Michael Cardew at Winchcombe Pottery and Wenford Bridge Pottery. She was the daughter of Bernard Darwin and his wife the engraver Elinor Monsell. Her brother was Sir Robert Vere Darwin. She was the great-granddaughter of Charles Darwin and the great-great-granddaughter of the potter Josiah Wedgwood.