Context: The earliest known references to the islands as a group appeared in the writings of sea-farers from the ancient Greek colony of Massalia. The original records have been lost; however, later writings, e.g. Avienus's Ora maritima, that quoted from the Massaliote Periplus (6th century BC) and from Pytheas's On the Ocean (circa 325–320 BC) have survived. In the 1st century BC, Diodorus Siculus has Prettanikē nēsos, "the British Island", and Prettanoi, "the Britons". Strabo used Βρεττανική (Brettanike), and Marcian of Heraclea, in his Periplus maris exteri, used αἱ Πρεττανικαί νῆσοι (the Prettanic Isles) to refer to the islands. Historians today, though not in absolute agreement, largely agree that these Greek and Latin names were probably drawn from native Celtic-language names for the archipelago. Along these lines, the inhabitants of the islands were called the Πρεττανοί (Priteni or Pretani). The shift from the "P" of Pretannia to the "B" of Britannia by the Romans occurred during the time of Julius Caesar.

Question: Where did the first known occurrence of the British Isle name appear in written material?
Answer: writings of sea-farers

Question: What is one of the earliest surviving records that mention the name British Isles?
Answer: Massaliote Periplus (6th century BC)

Question: What language do most historians agree upon where the Greek names for the British Isles came from?
Answer: native Celtic-language

Question: What did the ancient Greeks call the people that lived in the British Isles?
Answer: Πρεττανοί (Priteni or Pretani)

Question: When did the "P" sound of Pretannia change to the "B" sound of Britannia?
Answer: during the time of Julius Caesar

Question: What group of islands was first discovered my the Greek colony of Massalia.
Answer: Unanswerable

Question: What languages bored from the Greeks when they named the islands?
Answer: Unanswerable

Question: What Roman named the Islands?
Answer: Unanswerable

Question: Who changed Britannia to Pretannia?
Answer: Unanswerable

Question: The oldest known references to the agreements as a whole appeared where?
Answer: Unanswerable

Question: Most historians today agree that these British names most likely originated from what native languages names?
Answer: Unanswerable

Question: During the time of Julius Caesar, the shift from the B of Britannia to the P of what occurred? 
Answer: Unanswerable

Question: Although the original records have since been found, later writings that quoted from what are lost? 
Answer: Unanswerable