What is Obama's last name

Sadly the humanity will never know this or will we?

1st guy: Sup bro, hey do you know what is Obama's last name?
2nd guy: Yes its...Ohh shit

What is Obamas last name?

Obamas last name is...
My power is down...
Someone is at the Door...
OMG its ...

Guy1: What is Obamas last name?
Guy2: IDK