Assuming this translation is fairly correct.
Peter, an apostle of Jesus Christ, to the choice sojourners of the dispersion of Pontus, Galatia, Cappadocia, Asia, and Bithynia, according to a foreknowledge of God the Father, in sanctification of the Spirit, to obedience and sprinkling of the blood of Jesus Christ: Grace to you and peace be multiplied!
The foreknowledge of God the Father was that he would elect from the strangers (sojourners) of the dispersion for the purpose of God some to be set apart by the Spirit. (The firstfruits of the Spirit.)
What dispersion is this speaking of?
IMHO
Amos 9:9 For, lo, I will command, and I will sift the house of Israel among all nations,
Hosea 8:8 Israel is swallowed up: now shall they be among the Gentiles as a vessel wherein no pleasure.
Deut 32:26 I said, I would scatter them into corners, I would make the remembrance of them to cease from among men: (That is not a prophecy to the house of Judah the Jews. Men has always known who they are and have persecuted them. The Jews, the house of Judah were the own
of Jesus of the, "he came unto his own and his own knew him not." They are the fold of the, "other sheep I have which are not of this fold.)
Acts 15:14 Simeon hath declared how God at the first did visit the Gentiles, to take out of them a people for his name.
Does this not solve the question concerning the OP and is it not what the word of God says he would do concerning the whole family he brought up out of Egypt (Sin)? The only families of all the families of the earth that were known (intimate knowledge as a man to his wife) of God. This was said sometime between 700 BC and 721BC.