Thankful or God has heard
A modern phonetic variation of the Hebrew name Jaden or Jadon. In the Old Testament, Jadon was a builder of the Jerusalem wall, though the 'Jaydan' spelling is a contemporary American invention.
Less common today
Jaydan isn't in the latest US Top 1000. It last peaked at #859 in 2009.
US births per 5-year period, 1990βpresent (SSA data).