What do we know about Farnon?

Rachel: Where were you born?
Farnon: America. I don’t really know any more than that.
Rachel: What’s your birthday?
Farnon: April 20th—a birthday I share with Hitler, Napoleon, Joey Lawrence, the Columbine anniversary, and Louise Jamison, who played Leela on Doctor Who.
Rachel: I see. Ok, your middle name is A. What does the "A" stand for?
Farnon: Amateur. Or Anonymous, maybe? It’s a matter of indefinite articles.
Rachel: What was your family life like?
Farnon: The concept of family is hard for me to wrap my mind around. I was adopted into a relatively fragmented environment. A single mom in the lead, her husband until he died when I was in second grade, and four younger children from Korea. They were also adopted, with a handful of behavioral problems here and there.
Rachel: That was a quite environment for you to grow up.
Farnon: It was difficult on my mom, but my brain had already shut down. I stopped paying attention to anything happening in the family. I stayed locked in my room for 16 years and never spoke to anyone. I just had my own interests I didn’t bother sharing.
Rachel: You mean that you kind of locked yourself up as if none of your family existed?
Farnon: More or less.