The name is probably a modern invention, formed by blending the “Jay” sound from the 1970s-popular name Jason with the “den” sound from names like Braden, Hayden, Jordan and Zayden.[1] The biblical name Jadon (or Yadon), Hebrew for “he will judge”, appears in the Bible in Nehemiah 3:7,[2] but it is unlikely to be the source of the modern name.[1]
Probably taken from this.