Why the pseudonym?

I have two children, boys who are still at school. I became aware that they might not be comfortable with my social networking as a painter of this particular subject matter overlapping with theirs so I decided on a name. Infact I stole it. Joanna was my best friend when I was little. She was a bit of a tearaway frankly and I don't know what became of her. I took the surname from a childhood crush I was unfortunately destined to have a doomed affair with and now I resent the name but I'm stuck with it.

It's not a secret, everyone knows who I am and what I do, I'm not ashamed of it. I just don't want it to appear on my childrens' facebook wall. That's all.