Fonblanque and de Fonblanque are Huguenot names. They may refer to nine members of a prominent English family, descending from Jean de Grenier de Fonblanque, a naturalised Englishman as Jean de Grenier Fonblanque, and banker in London, who was descended from an ancient and noble Huguenot family of Languedoc:R. G. Thorne, The History of Parliament: The House of Commons, 1790–1820, Boydell & Brewer, 1986 The History of Parliament
Albany Fonblanque (1793–1872), English historian; Edward Barrington de Fonblanque (1821–1895), English historian; Edward Barrington de Fonblanque (British Army officer) (1895–1981), British Army officer; Florence Gertrude de Fonblanque (1864–1949), British suffragist; John Anthony Fonblanque (1759–1837), politician; John Samuel Martin Fonblanque (1787–1865), Commissioner of Bankruptcy; Philip de Fonblanque (1885–1940), British Army officer; Sir John Pennefather, 1st Baronet (1856–1933), full name John de Fonblanque Pennefather; Thomas de Grenier de Fonblanque (1793–1861), diplomat and Consul-General to Serbia.
References