Don't look to far for Naruto ^^
There's a city named Naruto. A bridge named Naruto and it's the first name of a ninja originating from the Iga provinice: Naruto Hattori, from the branch as Hanzo Hattori, the ninja who saved Ieyasu Tokugawa's life by taking him safely to Mikawa after Oda Nobunaga got attacked in Kyoto by Akechi Mitsuhide.
Uzumaki too is an existing name. (Google is your friend
)