William Cavendish, 7th Duke of Devonshire (April 27,1808 -December 21, 1891), was the great-grandson of the 4th duke and grandson of the 1st Earl of Burlington,who he succeeded in that title in 1834 before succeeding his cousin in the Dukedom in 1858.In 1829,he married a niece of the 6th duke, Lady Blanche Howard (1812 - 1840),daughter of the Earl of Carlisle. He endowed the Cavendish Laboratory, named after his relative Henry Cavendish.
