In 1809 Dudley Ryder 1st Earl of Harrowby (age 46) was created 1st Earl of Harrowby. [her sister-in-law] Susanna Leveson-Gower Countess Harrowby Lincolnshire (age 36) by marriage Countess of Harrowby.

On 12 Aug 1815 [her brother-in-law] Granville Leveson-Gower 1st Earl Granville (age 41) was created 1st Viscount Granville. Harriet Cavendish Countess Granville (age 29) by marriage Viscountess Granville.

The London Gazette 19103. Whitehall, January 14, 1833.

The King has been pleased to direct letters patent to be passed under the Great Seal, for granting the dignity of Duke of the United Kingdom of Great Britain and Ireland, unto [her husband] George Granville Marquess of Stafford (age 75), Knight of the Most Noble Order of the Garter, and the heirs male of his body lawfully begotten, by the name, stile, and title of Duke of Sutherland, in that part of the said United Kingdom called Scotland. [Note. Elizabeth Sutherland Duchess Sutherland 19th Countess Sutherland (age 67) by marriage Duchess Sutherland.]

The King has also been pleased to direct letters patent to be passed under the Great Seal, for granting the dignities of Baron and Duke of the United Kingdom of Great Britain and Ireland, unto William Harry Marquess of Cleveland (age 66), and the heirs male of his body lawfully begbtten, by the names, stiles, and titles of Baron Raby, of Raby-castle, in the county of Durham, and Duke of Cleveland.

The King has also been pleased to direct letters patent to be passed under the Grent Seal, granting the dignity of a Baron of the United Kingdom of Great Britain and Ireland, unto Charles Callis Western (age 65), Esq. and the heirs male of his body lawfully begotten, by the name, stile, and title of Baron Western, of Rivenhall, in the county of Essex.

On 10 May 1833 [her brother-in-law] Granville Leveson-Gower 1st Earl Granville (age 59) was created 1st Earl Granville. Harriet Cavendish Countess Granville (age 47) by marriage Countess Granville.