Gaspar de Quesada
Gaspar de Quesada (died April 7, 1520) was a Spanish explorer who participated in Magellan's circumnavigation as captain of the Concepción, one of the expedition's five ships. Approximately six months in to the expedition, Quesada, with two other Spanish captains, attempted to overthrow Magellan in the Easter mutiny at the South American port of St. Julian. The mutiny failed and Magellan had Quesada executed.