Jamieson, Fausset and Brown on Revelation 22:13

13. I am Alpha--Greek, "... the Alpha and the Omega." A, B, Vulgate, Syriac, Origen, and Cyprian transpose thus, "the First and the Last, the Beginning and the End." Andreas supports English Version. Compare with these divine titles assumed here by the Lord Jesus, Re 1:8, 17; 21:6. At the winding up of the whole scheme of revelation He announces Himself as the One before whom and after whom there is no God.