Family History Society

Re: Looking for Elphinstone History

I am the granddaughter of the late Edward Elphinstone. His brother is the late William Elphinstone. I know we have connections through marriage too Queen Elizabeth. The Queen mothers, sister married a Elphinstone. I beleive so far we have had 3 ladies in waiting that are linked too our family in some way. One as recent as 2002 which would be the Queens first cousin. However, I still am uncertain as too how we are related. If you could help I would greatly appreciate it.