I have kind of three sets of parents.
There's my birth parents, who I've never met. They're just kind of generic white and genetically speaking I'm a mix of Irish, Scottish, and German.
I have my legal set of adopted parents. I'm Ashkenazi through them. Also my mother's side of the family has been living in and around Boston for about 100 years now, so there's that.
My real set of adoptive parents are the parents of one of my best friends. (My relationship with my legal family outside of my grandfather and late grandmother is extremely strained.) They're also Ashkenzi and have been kickin around Boston for several generations.
So basically I'm Ashkenazi but the Massachusetts thing is also a huge part of my cultural upbringing. (People tend not to move far from home here which has lead to a pretty distinct regional culture.)