However, the author Kishimoto Masashi did not explain this situation in detail, and the surname problem did not lead to any important plot changes until the ending.
At present, the most recognized reason is that if the surname Feng Bo will bring danger to Naruto, he will change his surname to Vortex.
This statement really has no logic at all.
Where did the name Feng Bo come from? The danger of ninja enemies? Just because Namikaze Minato made too many enemies when he was the fourth generation Muhuo Camp, he was afraid of seeking revenge?
Namikaze Minato is an upright man, and he is also the object of enemy's fear rather than hatred on the battlefield. Most enemies think that Namikaze Minato is a worthy opponent. How could he assassinate him?
On the contrary, being named whirlpool is really asking for trouble. The vortex clan was destroyed in those days because they were afraid of their abilities. Whirlpool's descendants almost never named Whirlpool, such as Hexiang Phosphorus, just to remain anonymous. In order to protect Naruto, it is inexplicable that Naruto was given the name of "whirlpool" that was wiped out by the all-forbearing world, but he was not given the name of "Bofeng", a well-known decent hero in the forbearing world.
Moreover, Naruto's surname is not Bofeng, which makes the villagers think that he is just a pillar of strength in Kyubi no Youko. If his surname is Bofeng, everyone will know that his father sacrificed his life to seal Kyubi no Youko on his son, and he would not be so indifferent to Naruto out of respect. As a result, Naruto was almost depressed in childhood.
Then why is his surname whirlpool? There is no reason for the answer. There is only one reason: the author Kishimoto Masashi named Naruto Uzumaki at the beginning of his conception, without considering his parents. The names of the four generations of Muhuoying also came to mind at the same time. But later, the author felt more and more that it would be more wonderful to make these two men father and son. In order to solve the problem of surname, Naruto's mother's surname is Vortex, so it will not be self-contradictory to interpret it casually as "following her mother's surname".
This step-by-step approach can be found everywhere in Huo Ying. Judging from the overall performance of Naruto's surname, this possibility is the greatest.