Source: sandbox.knockKnockJokes [edit]
Q: Ashe who?
A: Bless you! 

Q: Nobel who?
A: No bell, that's why I knocked! 

Q: Leaf who?
A: Leaf me alone! 

Q: lettuce who?
A: Lettuce in and you'll find out! 

Q: Aaron who?
A: Why Aaron you opening the door? 

Q: Tank Who?
A: You're welcome! 

Q: Hawaii who?
A: I'm fine, Hawaii you? 

Q: Orange who?
A: Orange you even going to open the door! 

Q: Gray Z who?
A: Gray Z mixed up kid. 

Q: Who Who?
A: Is there an owl in there? 

Q: Anita who?
A: Anita borrow a pencil. 

Q: Woo who?
A: Don't get so excited, it's just a joke. 

Q: Figs who?
A: Figs the doorbell, it's broken! 

Q: Alice who?
A: Alice fair in love and war. 

Q: Annie Who?
A: Annie thing you can do, I can do better. 

Q: Yukon who?
A: Yukon say that again! 

Q: Boo Who?
A: Well you don't have to cry about it. 

Q: Theodore who?
A: Theodore is stuck and it won't open! 

Q: Cher who?
A: Cher would be nice if you opened the door! 

Q: Amos who?
A: A mosquito bit me! 

Q: Police Who?
A: Police let us in, it's cold out here!