Aharon was three years older than Moshe [as is explicit in Parshat VaEra]. And Moshe was eighty years old when he stood before Pharaoh, and Aharon was eighty-three years old, so he was born in year 2365. And in the matter of Aharon prophesying in Egypt for eighty years, so he began to prophesy when he was three years old, for from his birth until they left Egypt was eighty-three years. [Aharon was a reincarnation of Haran who died because of his father - Nadav and Avihu died because of Aharon their father (Chesed L'Avraham, Ma'ayan 5, Nahar 25).
Aharon was a reincarnation of Haran who was a reincarnation of Adam HaRishon, and Chur was also a reincarnation of Adam HaRishon. And Adam HaRishon also came into Chur, and so now into Aharon and Chur (Na'aM"ach). And he was reincarnated into Ezra (see year 3410). He was reincarnated into Eli (see year 2830).
His soul was reincarnated into Shmuel (see year 2830).] In those days Tzepho son of Elifaz son of Esav, king of Kittim, died in the fiftieth year of his reign, and he was buried in the city of Navna. And in his place Yanini (some say Yanush) reigned, one of the mighty men of the children of Kittim, for fifty years. After the death of Tzepho, Bilam son of Beor fled from the land of Kittim and came to Pharaoh in Egypt.
And he received him with great honor, for he heard of his wisdom, and he gave him gifts and elevated him and made him a counselor.