There was in the days of Herod, the king of Judea, a certain priest named Zacharias, of the priestly division of Abijah. He had a wife of the daughters of Aaron, and her name was Elizabeth.
See A CHRONOLOGICAL AND GEOGRAPHICAL (INTRODUCTION to the LIFE OF CHRIST) by CH. ED. CASPARI, From the Original German Work, Revised by the Author translated, with additional notes, by MAURICE J. EVANS, B.A. ;  EDINBURGH: T. & T. CLARK, 38 GEORGE STREET, mdccclxxvi, p. 57 (Logos resource) for documentation on the time the course of Abia served and possible date for birth of John and Jesus.