Maybe the name on his birth certificate is Barry Dunham and he never legally changed his name to Barack Obama. Which means he probably signed many documents without using his legal name.
There are probably many situations in his life he is trying to hide. He never listed any other names on his law application other than Barack Obama. And the application specifically asks for other names that have been used in the past.
If he had an Indonesian Passport, his name would have been Barry Soetero.
Oh there you go, Barry Dunham at birth and then he took on his mystical father’s name, to give himself an identity.
I understand that feeling, having been adopted at the age of 7. Difference is, I have known my real father my entire life and I would not want to write a book about it.
I am satisfied with my identity and love my Dad, who adopted me. I look up to him, as a man, and have almost no inclination to lionize my birth father.
So, it could be that he was born Barry Dunham and that would undo his stupid life narrative. Guess he wouldn’t want to append his books of fiction.