Matthew was nicknamed "Peanut" by his mother shortly after birth. How shortly, we're not really sure anymore; within the first few sleep-deprived days is all we remember.
Matthew never did go through that period of sleeping all the time that baby books tell you newborns are supposed to have. Since his first abnormally alert days he's just become more and more active, and at some point his uncle Grant conferred upon him the moniker Savage.
Monday, September 01, 2014
Matthew gives a talk that he wrote himself
I think he did eventually forgive his mother for volunteering him.