Sasuke Sarutobi

was the father of Hiruzen Sarutobi, and was renowned as a great ninja. Sasuke Uchiha was named after him in the hopes that boy would become as splendid a ninja just like his namesake.

Trivia

 * Sasuke Sarutobi is the name of a legendary ninja who was a member of the Sanada Ten Braves, a group of ninja that served under daimyo Yukimura Sanada during Japan's Warring States period.