There are psychics in our family, my grandmother was a psychic, she saw her own death and this spooked my mother so she never mentioned our psychic heritage when I was a child, I only learnt about it this year when I embraced the craft!
My aunty in Queensland is a psychic and sees spirits, always has, they live with her, but she’s not afraid of them.
My mother’s side comes from Northern Ireland (bogtrotters we were called) peasants basically
, but the women are all firecrackers, steeped in superstitions. Interesting my mother has a huge knowledge of herbs and potions and can make a tincture for practically anything. She used to have loads of stuff of our history, but it all got lost in Iran, when we had to flee during the revolution, so alot of our history got lost. And because her mother (my grandmother) died when my mother was 13, my mother doesn’t speak much about our history. Though she has a love of the craft, and has been happy that I’ve embraced it. She has more knowledge than she lets on, every now and then I get snippets of it. 
My dad is Anglo Saxon, and is listed in the doomsday book. My dad’s mother traced his family back to old Germany, so I think that’s where Loki comes into the picture, my dad’s side isn’t magical but my dad respects the supernatural albeit he’s afraid of it.
For me, I’ve always been contacted by spirit, whether I wanted it or not. Angels, demons, spirits, gods. I’ve not always known who or what but spirituality has always been important to me. I’m drawn to magic and even when I suppressed it when I was a strict Christian, it wouldn’t be suppressed so it’s in there somewhere.
I remember asking a psychic once, why I didn’t fit into the church, and she said there’s a history of persecution in your family, maybe your a witch, you should look at that!
So I think yes, things can be passed on, but I think as magic is all around us, we can learn it too.
Afterall, there must have been a first witch somewhere in history, who learnt it?! 

I tend to agree with Katerina
I think magic/deity/spirit, calls us regardless of our heritage, I think it calls everyone, but not everyone hears, and even those that do respond, we do so at the right time, when we’re ready to be moulded by spirit.
I don’t know. It’s interesting how everyone has their own unique experience. That’s what makes it magical.
