Complex sentence: The name "Ogyges" is related with the Greek Okeanos (Ὠκεανός, ocean) the great river that it was believed that surrounded the earth disc and the word seems to be derived from a Phoenecian root meaning "to encircle".
Split into simpler sentences: The name "Ogyges" is related with the Greek Okeanos (Ὠκεανός, ocean) the great river which was believed to surrounded the earth disc. The word seems to be derived from a Phoenecian root meaning "to encircle".