<prompt> Translate the following text to EnglishWakataalamu wa ramani wa karne ya 16 walichanganyikiwa na majina ya bandari hiyo, na mwishowe jina la bandari hiyo likawa San Juan, na kisiwa hicho chote kikaitwa Banda la Utajiri.  <response>: Sixteenth-century mapmakers back in Spain mistakenly confused the names, so that in the end the port became San Juan and the whole island was called a rich port ; once on the maps, the names stuck. 