Aaron (High Priest living at the time of Egypt and Wilderness)

Named once, to establish Elizabeth's priestly pedigree before John is even born (1:5): 'a daughter of Aaron.' Josephus gives the office itself its own origin story: Moses publicly vouching for his brother's character before the people accept him.

Aaron was the first high priest of Israel and the elder brother of Moses and Miriam, born to Amram and Jochebed of the tribe of Levi. When Moses balked at speaking for himself before Pharaoh, God sent Aaron to act as his mouthpiece, and the two brothers together led the exodus out of Egypt. Aaron married Elisheba and fathered four sons, Nadab, Abihu, Eleazar, and Ithamar, whose descendants carried the priesthood after him. He is named 333 times across the Old and New Testaments, most often at Moses's side, though the golden calf at Sinai remains the one moment he acted alone.