Things that just fit by dumb hammering down (with the blows mostly landing on fingers):
Poros - Po is a river=flower in Italy, or could be a pun on Poe.
...Which is my best - and only - guess so far.
Things that might fit with some craftier and more diligent hammering:
Cair Andros
Celebros
Rauros
Aros
Ladros
There are no more "-ros"es, scions or no. I'm totally lost.
Aros makes very little sense cryptic-wise, so I think I can eliminate that one.
Ladros and
Celebros don't seem impossible to hammer to the right shape.
Rauros and
Cair Andros are a bit oddly-shaped if you take the -ros away.
Nothing makes sense straight-clue-wise.
I promise to think more about it this evening.
EDIT: I just found out that there is a Rau River in Tanzania. So
Rauros also fits with the same logic as
Poros, but both look equally ridiculous from the straight clue perspective.
EDIT2: I was thinking before that it's Elros because of
this meaning of "el". I thought it somehow refers to "sacred". Well, I was wrong.