I don't think TPTB will ever grant us the favour of learning anything more about Wilson's family/origins. They made a point of not showing any of that to us so... We have never seen his parents or Danny, never even learned the name of his other brother. I doubt we will get to see them >.<. Even though it would make sense to just show them now. UNLESS, Wilson's family lives in Cleveland, and that's why they are going there.