William Debonaire Haggard FSA, FRAS (2 Feb 1787 – 4 Apr 1866) was a banker of the city of London, a numismatist, and an expert on bullion.
[10] Haggard was elected a Fellow of the Society of Antiquaries on 28 February 1833, described as "a gentleman peculiarly conversant in the numismatic antiquities of this country".
As Chief of the Bullion Office of the Bank of England, he was brought in front of the Bank's Governor William Cotton, Commissary-General Sir Edward Pine Coffin, MP Richard Lalor Sheil, and William Nairn Forbes of the East India Company, to testify.
The commission was appointed to inquire into the constitution, management, and expense of the Royal Mint under Queen Victoria, relating to the melting of gold coins into bars.
[12] He was also an art collector and his collection was sold at auction by Sotheby's, Wilkinson & Hodge on 22–23 August 1866.