!!! I hadn't even thought of that nickname for Eleanor. Ok, Eleanor is back on my list. DH will never approve but it's on my list.
And if you love it, I too say go for it. Coming up with a name that makes you go "that's the one!!!" seems to be very difficult, so if it feels right, it must be good.
My DH is determined to have this child named after a sci-fi character. Yes, he wants Anakin Skywalker Lastname, for example. I'm all for stepping outside the norm but that's just too far for me. Anakin on its own is ... far enough off the beaten path for me.