I think you've already gotten some great names so I won't even try.  They are very cute and have darling faces.   I don't know if it's wishful thinking on my part but I think I see hints of refinement & elegance about them so maybe they really are hackneys.  Do hackneys come that small though?   Are there any records about when the hoarder guy got them or their background?  And when will you find out if they are pregnant?  I hope they aren't.