Lord Frederick Cavendish-Bentinck (2 November 1781 – 11 February 1828) married Mary Lowther (d. 1863), daughter of William Lowther, 16 September 1820; had issue: George Cavendish-Bentinck
A stillborn baby, birthed at Burlington House on 20 October 1786.[3]
According to newspaper accounts, she was the mother of nine children, only four of whom were living at the time of her own death.
The duchess died at her home, Burlington House, Piccadilly, and was buried in St Marylebone Parish Church, Marylebone, London.[4] She “died of a bowel complaint, which she had been subject to for many years, and which terminated in a mortification after a short illness. It was at first suspected, from the violent inflammation in her bowels, that her Grace had eaten water-gruel out of a copper saucepan not properly tinned; but this suspicion is certainly erroneous, as it proved on examination.”[5]
Coat of arms of Dorothy Bentinck, Duchess of Portland
Coronet
Coronet of a Duke
Escutcheon
Quarterly 1st & 4th Azure a cross moline Argent 2nd & 3rd Sable three stags' heads cabossed Argent attired Or a crescent for difference (William Cavendish-Bentinck, 3rd Duke of Portland) impaling (William Cavendish, 4th Duke of Devonshire).
Supporters
Two lions double queued the dexter Or and the sinister Sable.
^The Scots Magazine, Volume 32 for birth and Oxford Journal 28 July 1770 Page 2 for death
^Newcastle Chronicle, 07 September 1771, Page 1. "The Duchess of Portland was safely delivered of a son, at his Grace’s house in Charles-street, Berkeley-square"