The title of Baron Mowbray is a very old one in the Peerage of England. It was held for a long time by the Mowbray and Howard Dukes of Norfolk. The title was united with the Barony of Segrave in 1368, and with the Barony of Stourton since the 19th century, when it and Segrave were brought out of the abeyance they had fallen into at the death of the 9th Duke of Norfolk.