 The term was eventually applied, by extension, to the Nicarao or Niquirano groups that inhabited that region.The Nicarao tribe migrated to the area from northern regions after the fall of Teotihuacán, on the advice of their religious leaders.According to tradition, they were to travel south until they encountered a lake with two volcanoes rising out of the waters, and so they stopped when they reached Ometepe, the largest fresh-water volcanic island in the world.