Wanna calculate for yourself? This is from Ancestry.com, and our 'common ancestor' was Johann. For Roger, it's Johann, Mathias, Valentine, and Edna; for me, it's Johann, Paul, Anton, and Mike--see? Third cousins!
Of course at least one Hesch married a Rauch...that would be Anna, daughter of Mathias Hesch, who married John A Rauch, the kid from across the road in Agram Township, west of Pierz.
These descendants, too, are invited to the reunion!