Themistoclea

Themistoclea, Theoclea was a priestess at Delphi who was said to be a teacher of Pythagoras.
In the biography of Pythagoras in his Lives and [Opinions of Eminent Philosophers], Diogenes Laërtius cites the statement of Aristoxenus that Themistoclea taught Pythagoras his moral doctrines: Porphyry refers to a teacher of Pythagoras called Aristoclea, although there is little doubt that he is referring to the same person. The 10th-century Suda encyclopedia calls her Theoclea and states that she was the sister of Pythagoras, but this information probably arises from a corruption and misunderstanding of the passage in Diogenes Laertius.