“The final messiah is David’s son, that is, a genealogical descendant from David’s house (cf. Rom 9.5); and as such, he is God’s son, too. This is how and why the early traditions about Jesus come to appropriate so easily the kingship psalms of the Septuagint. And likewise with Kurios, ‘Lord’—a reference, I think, to this final royal messiah also. ‘Kurios is to some extent an appropriate rendering of Christos, because it has a royal connotation that “Christos” would not have had in Greek.’ Kurios, in other words, also encodes this same figure of the final messiah, the scion of David’s house”  - Paula Fredriksen