Bean seed ID help

These bean seeds escaped their packet, any idea what they could be.  Its not one I've grown before so it might be a seed swap one.   They are predominantly white/creamy coloured with black mottling around their 'belly button', I've no idea what that bit is called 

Cow peas/black eye beans?

Thanks Boss, but looking at web pictures of those two those beans appear stumpier and the black more defined rather than splotchy like mine. I expect I'll just sow them to see what they turn into and be none the wiser.