Jan Peter Toennies: an ebullient serendipitous adventurer.

Our 1. Prologue section applauds some previous celebrations of Peter's inspiring ebullient adventures, including a remarkable new book by Giorgio Benedek and Peter on investigations of surfaces by helium beam scattering. The next sections treat 2. Peter's personal genealogy and 3. Peter's scientific genealogy. Section 4 presents Meanderings and serendipity on the way from Bonn to Göttingen. Section 5 lists Peter's awards and Section 6 is our Epilogue that features an Ode to Peter as well as his response.