Theophylact of Ohrid
Catena Aurea · Lukasevangelium 1
There was in the days of Herod, the king of Judæa, a certain priest named Zacharias, of the course of Abia: and his wife was of the daughters of Aaron, and her name was Elisabeth. And they were both righteous before God, walking in all the commandments and ordinances of the Lord blameless. And they had no child, because that Elisabeth was barren, and they both were now well stricken in years. The office was that of the Priesthood, as it is said, A certain Priest of the name of Zacharias.
Wishing to shew also that John was legally of Priestly descent, Luke adds, And his wife was of the daughters of Aaron, and her name was Elisabeth, for it was not permitted to the Jews to take a wife from any other tribe but their own. Elisabeth by interpretation signifies “rest,” Zacharias “the remembrance of the land.”