Who originated the term you know?

The origin of the phrase "you know" is uncertain, but it is believed to have originated in the early 1600s as a way for speakers to indicate that they were about to say something that they assumed their audience would already be familiar with. It was originally used in the sense of "if you know what I mean" or "as you are aware." The phrase has since become a common filler word in English conversation, often used to indicate a pause in thought or to signal that the speaker is about to change topics.