In Aug 1794 [his father] Thomas Dundas 1st Baron Dundas (age 53) was created 1st Baron Dundas. [his mother] Charlotte Fitzwilliam Baroness Dundas (age 48) by marriage Baroness Dundas.

The London Gazette 19629. Whitehall, June 23, 1838. The Queen has been pleased to direct letters patent to be passed under the Great Seal, granting the dignity of a Marquess of the United Kingdom of Great Britain and Ireland, unto Constantine Henry Earl of Mulgrave (age 41), and the heirs male of his body lawfully begotten, by the name, stile, and title of Marquess of Normanby, in the county of York. [Maria Liddell Marchioness Normanby (age 40) by marriage Marchioness Normanby.]

The Queen has also been pleased to direct letters patent to be passed under the Great Seal, granting the dignities of Viscount and Earl of the said United Kingdom, unto William Baron King (age 33), and the heirs male of his body lawfully begotten, by the names, stiles, and titles of Viscount Ockham, of Ockham, in the county of Surrey, and Earl of Lovelace. [Augusta Ada Byron Countess Lovelace (age 22) by marriage Countess Lovelace. She was a descendant of the previous Baron Lovelace.]

The Queen has also been pleased to direct letters patent to be passed under the Great Seal, granting the dignity of an Earl of the said United Kingdom, unto Laurence Baron Dundas (age 72), and the heirs male of his body lawfully begotten, by the name, stile, and title of Earl of Zetland.