Frisland – Wikipedia & Zeno

Frisland, also called Frischlant, Friesland, Frislanda, Frislandia, or Fixland, is a phantom island that appeared on virtually all of the maps of the North Atlantic from the 1560s through the 1660s. It was removed as no Frisland was found as the area was more thoroughly explored and navigation increased. Accurate navigation was more difficult in this time (before more accurate marine chronometers), and it might have originated from a misidentification of the Faroe Islands, Iceland, or Greenland.