Little fire; fiery one
Aydien is a modern phonetic spelling of the Irish name Aidan. It derives from the Gaelic name AodhΓ‘n, which is a diminutive of Aodh, the name of the Celtic god of fire.
Less common today
Aydien isn't in the latest US Top 1000. It last peaked at #5,046 in 2014.
US births per 5-year period, 1990βpresent (SSA data).