"IN Greek Mythology Artemis is the Greek Goddess of wolves." That is incorrect. Artemis is the Greek Goddess of the hunt, though she is quite fond of wolves. But she is not the Goddess of the wolves. Lupa is the Roman Goddess of wolves, if that helps any.
No, there is no Greek goddess called Diana. However, there is a Roman goddess called Diana. Diana's Greek counterpart is Artemis. Diana/Artemis is the goddess of the Hunt, childbirth, virgins, the moon, and wildlife. She is a virgin goddess.
Diana is not a Greek goddess. She is a Roman goddess. Her Greek equivalent is Artemis. Diana/Artemis is the goddess of the hunt, childbirth, virginity, wildlife, and the moon. She protects maidens, newborn animals, and women in childbirth.