Can the name 'Ellie' stand for other names besides Eleanora or Eleanor?

Yes it can stand for Elizabeth, Eleanora, Eleanor, Eliana, Elaine. What the name Elizabeth means is:
A meaningful wonderful person who loves to make other people smile, great with advice but hopeless when it comes to her own problems, strong willed and determined, always standing up for what she believes in, she try's to please everyone. Has most boys in a trance, Elizabeth is most suited to boys named Ethan or Sam.

The name Eleanora is a female English name.

The name Eleanor means: the bestest most weird but wonderful, beautifulest and funny best friend you can ever have, she's intelligent and the best to have a chat with, not shy at all, she loves too read and sing her wonderful heart out, but most of all she deserves to be loved by her best friend who does love her very much because she's wonderful :)

The name Elaine means: The meaning of Elaine is this; Elaine, whether it is a first name, middle, or last. This name symbolizes spontaneous, courage, seeming like the good type of kid, likes to conduct trouble. But your trouble is fun.

I hope this helps! :)

It can stand for many girl names that start with "EL".

Eleanor
Eleanora
Elaine
Elexis
Elizabeth
Eliana

Elizabeth or Ellen