Despite numerous studies of the word κύριος (‘Lord’) in the New Testament, the significance of the double form κύριε κύριε occurring in Matthew and Luke has been overlooked, with most assuming the doubling merely communicates heightened emotion or special reverence. By contrast, this article argues that whereas a single κύριος might be ambiguous, the double κύριος formula outside the Gospels always serves as a distinctive way to represent the Tetragrammaton and that its use in Matthew and Luke is therefore best understood as a way to represent Jesus as applying the name of the God of Israel to himself.