Isabell

Knock Knock
Who's there?
Isabell.
Isabell who?
Isabell a ding-dong.

Sherlock

Knock Knock!
Who’s there?
Sherlock.
Sherlock who?
Sherlock your door! Someone could break in…

Yoda

Knock, Knock

Who's there?

Yoda, he can't reach the doorbell.

Nobel

Knock, Knock.
Who's there?
Nobel.
Nobel who?
No bell, that's why I knocked!

Doughnut

Knock Knock!
Who’s there?
Doughnut!
Doughnut who?
Doughnut worry it is just a joke!

Little old lady

Knock knock!
Who's there?
Little old lady?
Little old lady who?
Wow! I didn't know you could yodel!

Al

Knock, Knock!
Who's there?
Al!
Al who?
Al give you a kiss if you open this door!