Interesting theory ive read that seems plausible

[WeaponXcel]

As the title says here go some:

Jiraya being Tobirama's son or some how related to him(Both had white hair and red markings on face) Also Hashi's funny personality could have been where Jiraya got his personality from since the 1st and Tobi are brothers, which if the theory is correct would make him Jiraya's uncle.

[Pravin5]

i made that theory long ago
i dont even remember when i posted that thread

[WeaponXcel]

Well good job broseph, it definitely holds some weight in my eyes

[Chiharu]

So Jiraiya is related to Tsunade.And he got the hots for her

[Itachi Rane]

Jiraiya can be tobirama's grandson according to your theory....however that would make him tsunade's cousin brother in a way.....btw, i'm really ontrigued about jiraiya and orochimaru's parents....

[godzillard]

well you know
that would be okay since he and tsunade never did anything

[Sarutobi Sasuke]

Tsunade is Hashirama's granddaughter. Jiraya and Tsunade are similar ages. You see where I'm going with this? Its not impossible but Jiraiya would more likely be Tobirama's grandson than his actual son.

On a side note, its amazing how young Hashirama looks in all his appearances. Even as a grandpa. Even as a Zombie. I think I made a thread (a very long time ago) about this with a collection of all his appearances in the manga. I came to speculate that his ability to produce such a high quality Yang-chakra made him immortal, in a way. Actually, eternal youth would be a more accurate way of putting it.

well you know
that would be okay since he and tsunade never did anything

Jiraiya spied on a nude Tsunade once and he got caught. Thats a bit weird if they'r related in that way.