God used different titles, such as “God Elohim”, “God Almighty”, “El Shaddai”, “Jehovah”, and especially “Jehovah Lord”, the redemptive name in the Old Testament.
“…unto us a child is born, unto us a son is given… and His name shall be called Wonderful, Counselor, the Mighty God, the Everlasting Father, the Prince of Peace” (Isaiah 9:6). This prophecy of Isaiah was fulfilled when the Son of God was named. “And she shall bring forth a son, and thou shalt call His name Jesus: for He shall save His people from their sins” (Matt.1:21).
“Neither is there salvation in any other; for there is none other name under heaven given among men, whereby we must be saved” (Acts 4:12).