The Marquis of Granby. A public-house sign in honour of John
Manners, Marquis of Granby, a popular English general (1721-1770).
says the old marquis owes his sign-board notoriety “partly to his
personal bravery and partly to the baldness of his head. He still
presides over eighteen public-houses in London alone.”
Old Weller, in Pickwick, married the hostess of the “Marquis
of Granby” at Dorking.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894