What is his name and what is His son’s name?

Proverbs 30:​4 Who has ascended to heaven and come down? Who has gathered the wind in his fists? Who has bound the waters in a garment? Who has established all the ends of the earth? What is his name, and what is his son’s name, if you can tell?

At first glance this may seem like it is saying that God has a physical son, but there are many things that are symbolic in the Hebrew Bible. Israel is called God’s son in the Bible and so is King David and Solomon. 

Exodus 4:22 ​And you shall say to Pharaoh, Thus said the LORD, Israel is my son, my firstborn; ​23 And I say to you, Let my son go, that he may serve me; and if you refuse to let him go, behold, I will slay your son, your firstborn.

Psalm 89:​21 I have found David my servant; with my holy oil have I anointed him …….. ​28 Also I will make him my firstborn, higher than the kings of the earth.

1 Chronicles 28:​6 And he said to me, Solomon, your son shall build my house and my courts; for I have chosen him to be my son, and I will be his father. 

This shows that it is talking about a symbolic son, either the nation Israel or an earthly king who was symbolically adopted by God.