en_tn/luk/01/59.md

On the eighth day

This could be translated as "On the eighth day after the baby was born" or "When the baby was eight days old."

they

This could be translated as "Zechariah's and Elizabeth's friends and relatives" or simply as "people."

to circumcise the baby

This could be translated as "for the baby to be circumcised" or "for the baby's circumcision ceremony." One person circumcised the baby, and the others were there to celebrate with the family.

they would have called him

"they were going to name him" or "they wanted to give him the name"

after the name of his father

This could also be translated as "like his father" or "his father's name."

by this name

Since Elizabeth had said the name and they were talking to her, this could be translated as "by that name."