PGK, with due respect to you, Ayatullahs are usually not an unbiased source of history. I don't have much respect for the politically motivated Mullahs of Saudi or Ayatullahs of Iran. They all are involved in spreading misinformation and anarchy in the region.
Coming back to the topic, your link is a news item loaded with Iranian claim on islands etc. That's besides the point.
I was asking about the oldest script / poetry / prose / map that refers this body of water as "Khaleej faris" or something like that.
Your quoted news article says the following:
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While historical documents show that the waterway has always been referred to as the 'Persian Gulf', .........[deleted]
In July 2010, archeological excavations in the Iranian port city of Siraf yielded new evidence confirming the antiquity of the Persian Gulf title.
Iranian archeologists discovered Sassanid and early-Islamic residential strata as well as a number of intact amphoras used in sea trade during the Parthian, Abbasid and early Islamic eras.
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But there is no link to the "historical documents" What are they and how far back they go in history.
What are the artifacts from the "archeological excavations in the Iranian port city of Siraf" and what do they show?
Peace.