'Families of the Earth' in the Bible

and I will bless them that bless thee, and him that curseth thee will I curse: and in thee shall all the families of the earth be blessed.

And thy seed shall be as the dust of the earth, and thou shalt spread abroad to the west, and to the east, and to the north, and to the south. And in thee and in thy seed shall all the families of the earth be blessed.

You only have I known of all the families of the earth: therefore I will visit upon you all your iniquities.

And it shall be, that whoso of all the families of the earth goeth not up unto Jerusalem to worship the King, Jehovah of hosts, upon them there shall be no rain.

Ye are the sons of the prophets, and of the covenant which God made with your fathers, saying unto Abraham, And in thy seed shall all the families of the earth be blessed.