What is another name for canellini beans?

I thought they were a runner bean

White Kidney Beans
http://www.wisegeek.com/what-are-cannellini-beans.htm

Cannellini are not the same beans as Great Northern, although if you can’t find cannellini, you could use Great Northerns as a substitute. The cannellini have a smoother texture when cooked and are frequently used in Italian (especially Tuscan) recipes. Great Northerns are more typical for recipes from the US/

I think Great Norther Beans are about the same thing.

They're sometimes called white kidney beans.