François or Francis Le Clerc, known as "Jambe de Bois" ("Peg Leg"), (died 1563) was a 16th-century French privateer, originally from Normandy. He is credited as the first pirate in the modern era to have a "peg leg".

He was often the first to board an enemy vessel during an attack or raid. It was this brazen style that eventually caused him to suffer the loss of a leg and severe damage to one arm while fighting the English at Guernsey in 1549. Although many pirates would have had their careers ended by such an injury, le Clerc refused to retire and instead expanded the scope of his piracy by financing the voyages and attacks of other pirates as well.

Despite his wounds, Le Clerc led major raids against the Spanish, who nicknamed him "Pata de Palo" ("Peg Leg"). In 1553, he assumed overall command of seven pirate craft and three royal vessels, the latter commanded by himself, Jacques de Sores and Robert Blundel. This same year he attacked the port of Santa Cruz de La Palma, in the Canary Islands, which he looted and set on fire, destroying a large number of buildings.

More Info: en.wikipedia.org