It makes me think of an older lady, only because it's my aunt's name. I disliked it for a long time (mostly due to her...she's nice enough, but very high & mighty too :-/) but now I think it's fabulous and would love to meet a little
Eloise. I also think of the character in the children's books, so I can definitely picture it on a little girl. I don't care that much for
Lois in general, but I don't see why it couldn't be a nn for it. I'd prefer
Ellie or
Ella or even
Louise (or
Lou or
Lulu). :)