Thomas Roussel Davids Byles (26 February 1870 – 15 April 1912) was an English Catholic priest who was a passenger aboard the RMS Titanic on its maiden voyage when it sank after striking an iceberg during the night of 15 April 1912.
He was reported as being amidst the throng of trapped passengers on the ship's rear deck in its final moments of descent, audibly praying.