Thankful or jade gemstone
Jadynn is a modern American invention, likely a blend of the Hebrew name Jada, meaning 'thankful,' and the precious green gemstone Jade. The 'ynn' suffix is a contemporary stylistic choice used to feminize and distinguish the name.
Less common today
Jadynn isn't in the latest US Top 1000. It last peaked at #2,958 in 2007.
US births per 5-year period, 1990βpresent (SSA data).