The name reached its all-time peak in 1998 with 4 births ranking #3142. FALLING Recent data shows the name is currently falling.
Aiden is a modern spelling of Aidan and carries the same meaning, "little fire". Parents often choose it for its familiar sound and slightly updated spelling.
Although the deeper roots are Irish and very old, the Aiden spelling rose later in modern English-speaking naming. It became especially popular in the United States during the 2000s.