ἐγώ εἰμι τὸ ἄλφα καὶ τὸ ὦ, ὁ πρῶτος καὶ ὁ ἔσχατος, ἡ ἀρχὴ καὶ τὸ τέλος → I am the Alpha and the Omega, the first and the last, the beginning and the end
interrogative: P. and V. πόθεν.
indirect: P. and V. ὁπόθεν.
relative: P. and V. ὅθεν, Ar. and V. ὅθενπερ, V. ἔνθεν (also Xen. but rare P.).