omg! u guys really didnt know
ok the answer is yes (im about 97% on this)
and heres why -
1 appearence only two people with blonde hair duh
2 would the fourth grab some random baby with dead parents and put the kyubi in him come on if he had to it would have been his son
3 also the fourth wanted his son ..um i mean naruto to be remebered as a hero show he had previous love for him ie son lol
4 itachi and kysime came looking for quote " the fourths legacy "
no 9 tails not kyubi not naruto or the kid
THE FOURTHS LEGACY
5 why else would jyrai be so protective and go out of his way to help naruto unless he felt he ownwd him something or knew him ie its his pupils son.
6 this by fear the MOST important and convincing factor
in the draft or pilot manga for naruto with was mean to be about demons which was altered ....
here it comes...
The Nine Tails WAS Naruto's Father !
there u go its all speculator but when u put it all together
that kinda evidence could easily convice a man
unles i was the defense lawyer