Father Abraham had many sons ...

Gen. 12:1-3

1 Now the LORD said to Abram,

"Go forth from your country,

And from your relatives

And from your father's house,

To the land which I will show you;

2 And I will make you a great nation,

And I will bless you,

And make your name great;

And so you shall be a blessing;

3 And I will bless those who bless you,

And the one who curses you I will curse

And in you all the families of the earth will be blessed."

To refer to why I am doing this - check out my entry on NT Wright and the Tree of Jesse.