Where does “knock knock joke” come from?

knock knock joke (English) comes from English joke, from Latin iocus, from Proto-Italic jokos, from Proto-Indo-European yokos, from Proto-Indo-European yek- — to utter.

knock knock joke (English): Alternative spelling of knock-knock joke

Definitions

  1. Alternative spelling of knock-knock joke

Ancestry of “knock knock joke”, step by step

knock knock joke traces back through two separate lines of ancestry.

via English joke

StepLanguageWordMeaning
1EnglishjokeAn amusing story; Something said or done for...
2Latiniocusa joke, jest; a form of amusement; pastime, sport
3Proto-Italicjokosword, saying
4Proto-Indo-Europeanyokosword, utterance
5Proto-Indo-Europeanyek-to utter

via English knock knock

StepLanguageWordMeaning
1Englishknock knockknock-knock joke; A phrase used to introduce a...
Every word from Proto-Indo-European yek-Every word from Proto-Indo-European yokosEvery word from Proto-Italic jokos