You must be an idiot who thinks about harem all the time.....There is only one wife of Zhou Yuan as he only loves her.
First of all you aren't worthy to think about their love
You... who is not even a mere piece
Su youwei, only a childhood friend nothing more
Names were changed to their english meanings (english official names)....
Tianyuan was changed to Heaven genesis world because tianyuan is a chinese word and the translators translated it to to the literal english meaning
As for the venerable Yuan it must have been because of the official chinese name when changed to english
Venerable may also have been chosen because it sounds more respectful