'Son' in the Bible

He answered and said, Lo, I see four men loose, walking in the midst of the fire, and they have no hurt; and the aspect of the fourth is like a son of the gods.

And thou his son, O Belshazzar, hast not humbled thy heart, though thou knewest all this,

I saw in the night-visions, and, behold, there came with the clouds of heaven one like unto a son of man, and he came even to the ancient of days, and they brought him near before him.

So he came near where I stood; and when he came, I was affrighted, and fell upon my face: but he said unto me, Understand, O son of man; for the vision belongeth to the time of the end.

In the first year of Darius the son of Ahasuerus, of the seed of the Medes, who was made king over the realm of the Chaldeans,