He thought it up and thought it sounded good.
Naruto stands for 9-tailed Demon fox in Japanese
In one of Jiraiya's books, the mane character is named Naruto and the 4th Hokage decided to Name his child Naruto.
Jiraiya wanted to call his son Naruto but he never had kids... The 4th Hokage then agreed of Naming his child Naruto fo Jiraiya.
Naruto's mother, in childhood had a friend named Naruto that tragically died and said she insisted that he was named Naruto.
Sasuke kills him with his sword
He blows him and Sasuke up
Sasuke runs chidori through his heart.
Tobi betrays him and attacks