Charles William Frederick Cavendish-Bentinck (8 November 1817 – 17 August 1865) was a priest of the Church of England who held livings in Bedfordshire.
Bentinck's paternal grandparents were William Cavendish-Bentinck, 3rd Duke of Portland, Prime Minister of Great Britain, and Dorothy Cavendish, a daughter of William Cavendish, 4th Duke of Devonshire, another Prime Minister, by his marriage to Lady Charlotte Boyle, a daughter of Richard Boyle, 3rd Earl of Burlington.
[5] After taking his degree, Bentinck confirmed his intention of becoming a Church of England clergyman and was appointed as Vicar of Husborne Crawley, Bedfordshire, a benefice in the gift of Francis Russell, 7th Duke of Bedford.
Bentinck died on 17 August 1865, aged 47, at Ridgmont, and was buried at Croxton, Cambridgeshire.
On 26 September 1839, while still an Oxford undergraduate, Bentinck married his first wife, Sinetta Lambourne, daughter of James Lambourne, a horse dealer with some claim to be the founder of Summertown, Oxford, where he lived with his wife Sinetta Smith, a gypsy.
They soon had two sons, but both died in infancy: The cause of death for both children was "convulsions", and both were buried at All Souls, Kensal Green Cemetery.