Now we can become Wiccan by birth??!! Lol.
I believe ravion meant to say "witch" not "wiccan". You cannot be born a religion but you can be born with a natural talent for magick or spiritually attuned.
Bloodline is a strong thing. Cherokee believe that the only important bloodline is the mother's (females). So your mother's mother's mother's....and so on.
What you are capable of is not controlled by what bloodline you are born into. From my observations, bloodline controls what gifts you have physically in your life NATURALLY, not what your spirit is capable of or what you can learn to do through study and practice.