Although we know the boy as Kyouhei and the girl as Mei, their official names have been revealed to be Nate and Rosa (respectively)! Pretty good names in my opinion 😀 Behind the spoiler are two characters who are plot related. As Zowayix noted, these names play on the theme of “resonance” (kyoumei in Japanese) and their names sound like resonate.
Above is Shadow of the Shadow Triad, originally Dark of the Dark Trinity. We also have Alder’s grandson’s name, Benga, which was Banjirou for the Japanese release. [/spoiler]