I went to a school with an Eleanor, who really embodied her name by being way into the local SCA group, doing ren fairs all the time, and is now a medieval history professor.
She's the most Eleanor Eleanor you can possibly Eleanor.
Eleanor (spelled "Ellinor" here) has definitely made its comeback already, we considered it if we got a girl (got a boy instead) and have since met multiple Ellinors in his age group.