ἀνατολὴ ἀνατολῶν -> sunrise of sunrises

[Nona35]

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Ἐπεσκέψατο ἡμᾶς, ἐξ ὕψους ὁ Σωτὴρ ἡμῶν, ἀνατολὴ ἀνατολῶν, καὶ οἱ ἐν σκότει καὶ σκιᾷ, εὕρομεν τὴν ἀλήθειαν· καὶ γὰρ ἐκ τῆς Παρθένου ἐτέχθη ὁ Κύριος.
In this hymn, the expression "ἀνατολὴ ἀνατολῶν", how can we understand it exactly, because it varies between languages and it bears several versions. 
Thank you.

[billberg23]

In this Christmas hymn, Jesus is called "Sunrise of sunrises" (ἀνατολὴ ἀνατολῶν), probably because he is seen as finally illuminating a world in the grip of darkness, comparable to the freshly rising sun after the winter solstice. 

[Nona35]

Can we associate it to this :" ΘΕΟΣ θεῶν Κύριος ἐλάλησε καὶ ἐκάλεσε τὴν γῆν ἀπὸ ἀνατολῶν ἡλίου μέχρι δυσμῶν"
(psalm 49:1)?

[billberg23]

Of course the construction of ΘΕΟΣ θεῶν is the same, just like "King of kings and lord of lords" -> Βασιλεὺς βασιλέων καὶ κύριος κυρίων (Revelation 19:16).