Not truly. Nomura said that the names relate
loosely to Wind, Earth, and Sea. Like, it really woulnd't matter IMO.
Sora/Ven = Wind
Riku/Terra = Earth
Kairi/Aqua = Sea
The characters from BBS are obviously names based on earth, wind, and sea.
-Sig credit goes to PhilXZ. The pic of Kairi's head was cropped by Rathalos9. Apparently no one else can crop Kairi's head...