en_tn/mat/01/20.md

This continues to tell about the events leading up to the birth of Jesus.

appeared

an angel came suddenly to Joseph

son of David

In this case, the expression "son of" means "descendant of." David was not Joseph's father, but David was Joseph's ancestor.

the one who is conceived in her is conceived by the Holy Spirit

"the Holy Spirit conceived the baby with whom Mary is pregnant." (See: rc://en/ta/man/translate/figs-activepassive)

She will give birth to a son

Because God sent the angel, the angel knew the baby was a boy.

you will call his name

This is a command: "call his name" or "give him the name" or "name him"

he will save his people

"his people" refers to the Jews