-Sakumo Hatake raised Kakashi Hatake in a way that made him one of the strongest Shinobi in the world of Naruto. Lots of people also suggest that Sakumo Hatake and Minato Namikaze are very similar as well. And since Naruto Uzumaki was still an infant when his father died, his father couldn’t of trained him. If Jiraiya is Sakumo Hatake, then it makes sense, because Sakumo Hatake raised Kakashi Hatake to be one of the strongest shinobi in Naruto, and Jiraiya trained Naruto Uzumaki to become one of the strongest ninja as well.
If You Feel free to discuss on this because honestly I was just all over the place due to the fact I was tired and hype as hell.
Source → Narutopedia