It's a very 'old lady' name here in the UK, and not in the vintage charm sense, in the fusty sense. I have a great-aunt
Eileen, she's in her 90's, and my friend's gran is
Eileen and she's almost 80. 75+ is the kind of age range I see it as.
I also think of the song '
Come On
Eileen'.
~Charley~
https://www.behindthename.com/pnl/184785