Keith has nicknamed Elinore, Pooka Bear. When he first started it I wasn't a fan, but it has stuck. He even sings a song that makes her dance every time with her nickname in it. While I don't call her by her nickname, her brothers too.
My dad's has created his own nickname for her too, which actually comes from my childhood nickname from my dad. As a kid, and still sometimes, my dad has called me Boo Boo. Apparently as a child, I had a great time playing peek-a-boo. So now, Elinore is called 'Lil Boo.