No founder, founding document, or first observance has been identified for National Jayden Day. The date is in circulation on holiday listings, and nothing found names who put it there.
A name assembled from a sound
Jayden did not descend from anywhere. Behind the Name files Jaden, the base spelling, as an invented name, using the popular den suffix sound found in such names as Braden, Hayden and Aidan, first common in America in the 1990s.
The biblical connection arrived afterwards, and it is looser than it looks. The same reference treats Jaden as only sometimes considered a variant of the biblical name Jadon, borne by a minor Old Testament character. Jadon's Hebrew name is of uncertain meaning, possibly thankful, possibly he will judge.


