'Name of the Lord' in the Bible

Then David told the Philistine, "You come at me with a sword, a spear, and a javelin, but I come to you in the name of the LORD of the Heavenly Armies, the God of the armies of Israel whom you have defied.

Jonathan told David, "Go in peace since both of us swore in the name of the LORD: "May the LORD be between me and you, and between my descendants and your descendants forever.'" Then David got up and left, while Jonathan went to the city.