One of the old testament titles of god was "the hashem" which literally meant " the name ". Throughout the old testament you hear things like " we have established the name of god here " or " an angel with the name of god lead me ". It was a reference to the power or being of what god was or is. Not just uttering a magical word.
When Jesus says things in the new testament to the reference making the name of god known, it is more making reference to the power or being of what God is, not just providing first century Christians with the missing letters of the tetragrammaton.
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