'Only begotten' in the Bible

And Jephthah will come to Mizpeh to his house, and behold, his daughter will come forth to his meeting with drums and with lutes: and she the only begotten; not to him beside her, son nor daughter.

O daughter of my people, gird on sackcloth, and roll thyself in ashes: make to thee the mourning of an only begotten, a wailing of bitterness; for he laying waste shall suddenly come upon us.

And I poured out upon the house of David and upon the inhabitants of Jerusalem the spirit of grace and supplications: and they looked to me whom they pierced, and they mourned for him as mourning for the only begotten, and being embittered for him as being embittered for the first-born.