sentences:  There are also many examples of re-using names from island to island (for example, Cedros, São Pedro, Feteiras, or Calheta).Three theories have developed about the naming of the archipelago.It is clear that after 1420, regular expeditions captained by Gonçalo Velho Cabral, Diogo de Silves, and other mariners began exploring to the west and south of continental Portugal.