It would be considered Moonglo over Moonglow.  Since the doll is based off from the show character not vice versa. Since the doll was made in germany I would think they wouldn't know about our spelling.  And looking up the literal translation of her name that would be correctly spelt? Itis after all Rainbow Brite not Rainbow Bright which makes the name original. If we were going to use Moonglow as the name picked by fans why don't we could go and say that Tickled Pink owns Sunriser.