This list of mythical creatures that begin with this letter and I am constantly gathering information from each continent, and is continually being updated.
Patagon (Medieval folklore)
The Patagones or Patagonian giants were a race of giant humans rumoured to be living in Patagonia and described in early European accounts. They were said to have exceeded at least double normal human height, with some accounts giving heights of 13 to 15 feet or more. Tales of these people would maintain a hold upon European conceptions of the region for nearly 300 years.
The first mention of these people came from the voyage of Ferdinand Magellan and his crew, who claimed to have seen them while exploring the coastline of South America en route to the Maluku Islands in their circumnavigation of the world in the 1520s. Antonio Pigafetta, one of the expedition's few survivors and the chronicler of Magellan's expedition, wrote in his account about their encounter with natives twice a normal person's height.