King of heaven is one of the Aramaic names for God in the Old Testament. It is a name that was coined by Nebuchadnezzar after he had humbled himself and God restored him to sanity.
King of heaven in Aramaic:
Strong’s Concordance numbers: 4430, 8065
Bible reference: Dan. 4:37
I, Nebuchadnezzar, praise and extol and honour the King of heaven, all whose works are truth, and his ways judgment: and those that walk in pride he is able to abase. (Daniel 4:37 KJV)
Similar names for God are God of heaven, Lord of heaven, and God in the heavens. He is also the God of heaven and earth. In the New Testament alone, we find other names of God, our Master in heaven. Several names call God “king.”