Éile / Éle was the name of a small medieval kingdom in Northern Munster:
https://en.wikipedia.org/wiki/%C3%89ileBut I've looked through various early Irish name sources, and can't find any historical evidence for it as a person's name, or Aodhla: just fairly recent birth announcements.
So as they only seem to have been used as names recently, I'd guess they were modern Irish invented names based on the sounds of popular
Ayla,
Isla etc.