 All of the Gundam pilots names have a number theme: Heero Yuy  ("Hee" being Japanese kanji for one); Duo Maxwell ("Duo" meaning  two); Trowa Barton ("Trowa" based on the French word for three);  Quatre Raberba Winner ("Quatre" is the French word for four); Wufei  Chang ("Wu" is Chinese for five). Also, most of the other characters  also have this number theme, ie. Milliard Peacecraft ("Milliard" is  French for billion); Lady Une ("Une" is French for one); Treize  Khushrenada ("Treize" is French for thirteen) and many more.