First cousins share a common grandparent as demonstrated below, but what do, for example distant 5th cousins share? How do you trace that? I have posted a couple photos below that is from Ancestry.com that I hope will help the fellow genealogist try to understand what could be confusing in cousin terminology.
Again, these are not my charts, these are from Ancestry.com. I could not provide the direct link to the source because this actually is the page to my DNA results but I think this is good information to share.
The following is a link that I can provide that helps explain cousin terminology, but I apologize if it is not accessible, you may have to be logged into the site:
http://help.ancestry.com/app/answers/detail/a_id/5226/kw/cousin%20degrees#res2
Happy searching and I hope this helps my fellow genealogists.