'Son' in the Bible

He made answer and said, Look! I see four men loose, walking in the middle of the fire, and they are not damaged; and the form of the fourth is like a son of the gods.

And you, his son, O Belshazzar, have not kept your heart free from pride, though you had knowledge of all this;

So he came and took his place near where I was; and when he came, I was full of fear and went down on my face: but he said to me, Let it be clear to you, O son of man; for the vision has to do with 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 kingdom of the Chaldaeans;

And at the end of years they will be joined together; and the daughter of the king of the south will come to the king of the north to make an agreement: but she will not keep the strength of her arm; and his offspring will not keep their place; but she will be uprooted, with those who were the cause of her coming, and her son, and he who took her in those times.

And his son will make war, and will get together an army of great forces, and he will make an attack on him, overflowing and going past: and he will again take the war even to his strong place.