John Fonblanque

John Fonblanque may refer to:


 * John Anthony Fonblanque (1759–1837), English equity lawyer and Member of Parliament for Camelford 1802–1806
 * John Samuel Martin Fonblanque (1787–1865), Commissioner of Bankruptcy
 * Sir John Pennefather, 1st Baronet (1856–1933), full name John de Fonblanque Pennefather