In John 1:9-13 we see three groups of people described
- The World – They did not know Him
- His Own – They did not receive Him
- The Children of God – They received him and believed in His Name.
More specifically you could say there are two groups, the World (Gentiles/Greeks) and Israel and out of those two groups God the Father, through Jesus Christ has called and elected a third group – The Children of God!