Likely she was adopted into what religion became Greek myth when the Greeks encountered and absorbed other people - already in worship to a deity that was her likeness - into their civilization.
She was never alive, she was a goddess in ancient religion of the Greeks and peoples of that region.
The temple of Artemis was built so the ancient Greeks had a place to worship the goddess Artemis.
Ancient Macedonia being Greeks on the northern Greek peninsula shared the same religion, language, culture, etc as all other Greeks. Some examples of their deities include Zeus, Hera, Athena, Poseidon, Hades, Artemis, and Apollo.
Artemis.
Artemis was known as Artemis to the Greeks and as either Diana or Selene to the Romans.
Artemis sided with the Trojans, the Trojans then lost the war with the Greeks.
Artemis
Agamemnon, leader of the Greeks against Troy, sacrificed his daughter Iphigeneia to Artemis to gain a fair wind - thus earning her wrath.
Artemis was worshiped by the Ancient Greeks during the Bronze Age.
Yes, the Greeks built many temples honoring the goddess Artemis. The most famous one is the Temple of Artemis in Ephesus. It's one of the seven wonders of the ancient world.
Artemis was worshiped by the ancient peoples of the Mediterranean.
Artemis was angry because the Greeks had killed one of her favorite animals, a hare and its young, and wouldnt be appeased untill Agamemnon slayed his daughter. Artemis was appeased but she still had the side of the Trojans, not the Greeks. =) This came from "The Iliad" or the book "Edith Hamilton Mythology"