The concept of the Son of God is brought out in Proverbs 30. The author is a humble man who has embarked on a long, zealous, but fruitless search for the knowledge of the Holy One (plural adjective), Proverb 30:1-3. He then poses six questions.
The first four are rhetorical because the answer is obvious:
“Who has ascended heaven and come down?
Who has gathered up the wind in the hollow of his hand?
Who has wrapped the waters in his garment?
Who has established all the extremities of the earth?”
The obvious answer to these questions is God, God, God, and God. The creator and sustainer of this world is God. Now we have the fifth question.
What is his name…
In Jewish and biblical thinking the “name” of someone or something can be a term describing the character of that object or person. The author is asking here either, “What is God’s personal name?” or “What is God’s character like?” The answer to the fifth question would be either YHVH or other terms describing the character of God. There is a choice presented but the answer is straightforward.
However, the sixth question is not so straightforward.
For his son’s name, if you know it?
It appears that God has a son, although his name or characteristics have not yet been revealed. Remember, God’s revelation is progressive. It is disclosed step-by-step, over time, as the Bible unfolds. The full revelation about the Son of God will come through the prophets and culminate in the Brit Chadashah. Complex, indivisible unity in the Godhead remains a live option.