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.
On September 26, 1839, during his time as an undergraduate at Oxford, Bentinck married his first wife, Sinetta Lambourne, the daughter of James Lambourne, who had some claim to be the founder of Summertown, Oxford. They lived with their wife, Sinetta Smith, a gypsy.