Yeshua — His Name Is "Jehovah Saves"
The name "Jehovah saves" simply tells us that Jehovah is the source of
salvation and Jesus is the agent. The name describes what Jehovah does
through Jesus, not who Jesus is.
Read carefully. The angel does not say "you shall call his name Jesus, for Jehovah will save his people through him." The grammar attaches the saving directly to the child: "for HE will save his people from their sins." Then read — Jesus forgives a paralytic's sins, the scribes immediately accuse blasphemy ("who can forgive sins but God alone?"), and Jesus responds by healing the man to prove He has authority on earth to forgive sins. He doesn't deny the scribes' premise that only God can forgive — He demonstrates that He has that authority. So the name "Yeshua / Jehovah saves" is borne by the one actually performing Jehovah's exclusive saving acts. This is the bridge between Old Testament salvation (in Jehovah's name) and New Testament salvation (in Jesus' name) — the name itself confesses that the one named is Jehovah doing the saving.
His name announces Jehovah's salvation — and then He performs it. The name and the act match. He is the saving Jehovah He is named for.
Many Hebrew names contain Jehovah and don't mean the bearer is Jehovah
That's true of confessional names — Elijah ("My God is Jehovah"), Jehoshaphat ("Jehovah judges"). Those describe what Jehovah does and the bearer's confession about Him. But is different in two ways. First, the angel attaches the saving act to the named child directly: "you shall call his name Jesus, for HE will save." The name and the act are joined to the same person. Second, confirms the child does what only God can do — forgive sin. Theophoric names usually point away from the bearer to God. This name points to the bearer because the bearer is doing what God alone does.
Jesus forgave sins on Jehovah's behalf — as His agent
— the scribes objected, "Who can forgive sins but God alone?" Jesus did not say "I am acting as God's agent." He proved He had authority Himself by healing the man. He met their objection — "only God can forgive sin" — by demonstrating the power Himself, on the spot. If He were a created agent, the moment to clarify was right there. He didn't clarify. He acted.
This is a short hinge argument. Don't try to build the whole salvation case from it — pivot to the wider name-of-salvation verse stack, or to the calling-on-the-name chain, once the door has been opened.
Read in your NWT. Then ask: whose name is announced when the angel names the child? And whose work is described — Jehovah's or the child's?