THE GOSPEL ACCORDING TO LUKE - Chapter 1 - Verse 59
Verse 59. On the eighth day. This was the day on which it was required to circumcise children, Ge 21:4.
And they called him Zacharias. The name of the child was commonly given at the time of the circumcision, Ge 21:3,4. The name commonly given to the eldest son was that of the father.