Perhaps from the same as oros (through the idea of elevation); the sky; by extension, heaven (as the abode of God); by implication, happiness, power, eternity; specially, the Gospel (Christianity) -- air, heaven(-ly), sky.
see GREEK oros
οὐρανέ (ourane) − 1 Occurrence
οὐρανοί (ouranoi) − 7 Occurrences
οὐρανοῖς (ouranois) − 36 Occurrences
οὐρανὸν (ouranon) − 43 Occurrences
οὐρανὸς (ouranos) − 12 Occurrences
οὐρανοῦ (ouranou) − 92 Occurrences
οὐρανοὺς (ouranous) − 5 Occurrences
οὐρανῷ (ouranō) − 35 Occurrences
οὐρανῶν (ouranōn) − 42 Occurrences