I have pointed to number 3 many times. The number of circles/tombs in Cork all point to them being family monuments. I've believed this for ages, Gordon's method has (I think) shown me how.
But come on now, you can not seriously believe that Stonehenge is a one family thing. Stonehenge is so much more than just a circle of big stones ... its a landscape in its own right.
Some other smaller sites yes, but not the big boys.