The Oringal Big Hero 6 had the same name as it was originally created Big Hero 6 was originally a Marvel Comic and then is became a Disney movie in 2014. Big Hero 6 was first created in 1998. The charatcers in The Big Hero 6 comic had the same names as they did in the movie.
The only difference is Hiro Last named is different in the comic Hiro's last name in the movie is Hamada and his last name in the comics is Takachiho.
Hiro Hamada in the Big Hero 6 movie is Half Japanese and Half White and Hiro in the comics is fully Japanese.
Then after the movie is a Big Heor 6 the Series and is 2D and Big Hero 6 the movie is a 3d animation. and after the series then Baymax came in the first Baymax trailer Hiro was not in the tralier and on facebook people say where is Hiro and then final they put Hiro in the second trailer because they know they where compaining.
In the future I hope there can make a show called The Hiro Hamada show and Hiro doing martial arts instead of Baymax because I read that Hiro knew Martial arts and took it with his brother before he created his robot Baymax.