Here's a few stories I've read (some are WIP still) that Harry Potter is some type of family relation to the Winchesters.


Harry is Dean's son:
http://archiveofourown.org/works/4966204/chapters/11404594
In my Time of Rising by njchristpatrick (this is a WIP)

https://www.fanfiction.net/s/6947416/1/Daddy-Dean
Daddy Dean by fanficoholic

Harry is Dean/Sam's Brother??
https://www.fanfiction.net/s/7295272/1/Big-Brother
Big Brother by fanficoholic (haven't read this one so not sure)

Harry is Dean/Sam's brother
https://www.fanfiction.net/s/8619336/1/Harry-Winchester
Harry Winchester by Magster1102

Harry is Dean/Sam's cousin??
https://www.fanfiction.net/s/5387052/1/Wayward-Sons
Wayward Sons by Belgium-Morning

Harry is Dean/Sam's brother
http://archiveofourown.org/works/5522324/chapters/12748295
My Wayward Wizard son by misteeirene (this is a WIP)