'Only Son' in the Bible

And he said, Take now thy son, thine only son, whom thou lovest, even Isaac, and get thee into the land of Moriah. And offer him there for a burnt-offering upon one of the mountains which I will tell thee of.

And he said, Lay not thy hand upon the lad, neither do thou anything unto him. For now I know that thou fearest God, seeing thou hast not withheld thy son, thine only son, from me.

and said, By myself have I sworn, saith Jehovah, because thou hast done this thing, and hast not withheld thy son, thine only son,

O daughter of my people, gird thee with sackcloth, and wallow thyself in ashes: make thee mourning, as for an only son, most bitter lamentation; for the destroyer shall suddenly come upon us.

And I will turn your feasts into mourning, and all your songs into lamentation; and I will bring sackcloth upon all loins, and baldness upon every head; and I will make it as the mourning for an only son, and the end thereof as a bitter day.

And I will pour upon the house of David, and upon the inhabitants of Jerusalem, the spirit of grace and of supplication; and they shall look unto me whom they have pierced; and they shall mourn for him, as one mourneth for his only son, and shall be in bitterness for him, as one that is in bitterness for his first-born.

Now when he drew near to the gate of the city, behold, there was carried out one that was dead, the only son of his mother, and she was a widow: and much people of the city was with her.