Yes.

My former psychiatrist/therapist is friends of a former college, a family practice doctor with whom I worked for three years from 2011-2014. She also apparently graduated highschool in the same class as one of my male cousins and a church friend of mine. I do not know if she knew them or not, as it was a graduating class of several hundred people and I only discovered this after I was finished seeing her. She's also the aunt of a little girl who attends the same library story time that my daughter and I attend.