Based upon the naming conventions we have been told: that one could be bordering, but I would say it's a safer bet than something like Akara Asume. In the generator: Amari (sharp ending vowel) shows up as a last name and there are a few that follow the beginning name as well, however, the one you mentioned does come across very Japanese. This is most likely up to each person's preference on whether such a name would be considered an "issue".
Though, as for stating it's a Miqo'te who took on a highlanders name, then technically you are correct : it does not follow the naming conventions for the highlanders. Nor does it follow midlander. But, as mentioned by Rock, there are a few wild cards out there. Some RPers will choose to follow the naming guides strictly; others will not. If the girl/guy wants to roleplay that is her name: I see no reason why she can't. To me, it's a personal choice as long as one is willing to bare the facts that ICly they might get a few strange looks for their name.
Though, as for stating it's a Miqo'te who took on a highlanders name, then technically you are correct : it does not follow the naming conventions for the highlanders. Nor does it follow midlander. But, as mentioned by Rock, there are a few wild cards out there. Some RPers will choose to follow the naming guides strictly; others will not. If the girl/guy wants to roleplay that is her name: I see no reason why she can't. To me, it's a personal choice as long as one is willing to bare the facts that ICly they might get a few strange looks for their name.