Well, good guesses, one and all, and a guess it would have to be.
The correct relationship is... we all went to the same high school!
Well, except for Telly Sevalas, but he taught there for several years before becoming an actor! Going back into the mid-'40's everyone on this list, including me, attended the same high school in New York City. Simone and Garfunkel, a few years ahead of me, were in my older brother's classes.
:Whistle: We sing of our deep devotion to the school of the Blue and the White!
To halls of learning that will lead us on the path that will lead to the light!,....
Goodnight all!
Stitchawl