Phonetically, Roen and Rowan are identical... the Japanese are often really terribad at English-sounding names, should be OK to give it a better one.
The thing I don't get about this manga, while nice, is what exactly Bard did for like, two decades after Aidra came back... why didn't he marry her? She never formally married the guy in the other kingdom, and she came back after just a few years, and it's pretty obvious they love each other, right?
Dude cockblocked himself for 20 years why? Is he an old man virgin at this point, because the story has never shown him getting close to any other woman.