William Ponsonby, 1st Baron de Mauley

William Francis Spencer Ponsonby, 1st Baron de Mauley (31 July 1787 – 16 May 1855), was an English Whig politician who sat in the House of Commons between 1826 and 1837.

[1][2] Ponsonby was elected Member of Parliament for Poole in 1826 and held the seat until 1831, when he lost it in a by-election to Lord Ashley.

[8] Unfortunately, he was not noted for tact or intelligence—Melbourne's sister Emily Lamb, Countess Cowper, described him as being universally regarded as "an ass and a jackanapes".

[8] On 8 August 1814, Ponsonby married Lady Barbara Ashley-Cooper (the only daughter and heir of the 5th Earl of Shaftesbury and a co-heir of the medieval barony of Mauley, 1789–1844).

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