This isn't really something for the questions thread just cause this doesn't really have an answer, or at least not an immediate one.
My bff was sharing some old pictures with me last night via email that she had scanned onto her laptop, including pictures of her parents when they were young, like of her mother on her wedding day and when she was in college.
And her mother as a young woman bears a very striking resemblance to my grandmother, as in they could easily be sisters. (My friend's 20some years older than me so her mother would have been around the same age as my grandmother) Very similar eyes and smile, as well as face shape. That and from comparing notes on her mother and my grandmother, personality wise they were a lot alike.
Yet, as far as we know, friend and I do not have any shared relatives, and didn't even know each other till about 5 or 6 years ago. So either her mother and my grandmother just have one of those faces that are common, or somewhere back in both of our family trees there's a link! LOL!