- Cecil Ainslie Walker-Leigh
 Birth - 1866 - Ballyseedy Castle, Tralee, County Kerry, Ireland - Henry J. Hindson
 - Holroyd Fitzwilliam Way
 - Hanoch J. Spivey
 Birth - about 1866 - New York, USA - William James Viggars
 Birth - 1866 - Cheshire, Staffordshire, England - Sarah Frances Hougelin
 - Johannes Bachmann
 - Laura Alice Kochensperger
 - Sarah Kokensparger
 Birth - about 1866 - Perry County, Ohio, USA - Noah Ervin Yarger
 Birth - about 1866 - Clayton Township, Perry County, Ohio, USA - Anna Elisabeth Tschirren
 Birth - 1866 - Niedermuhlern, Bern, Switzerland - Louis H. Kochersberger
 Birth - 1866 - Borough of Manhattan, New York City, New York County, New York, USA - William H. McKnight
 Birth - about 1866 - Philadelphia, Philadelphia County, Pennsylvania, USA - Philipp Melancthon Nader
 Birth - about 1866 - Jackson Township, Perry County, Ohio, USA - Josiah Cornish
 Death - 1866 - Rome, Oneida County, New York, USA - Levi Knowles Perot
 Birth - 1866 - Philadelphia, Philadelphia County, Pennsylvania, USA - Charles Frederick Nader
 - Anna Catharina Schneider
 Death - 3 January 1866 - Oberbetschdorf, Kreis Weissenburg, Niederrhein, Alsace, France - Emil Kochersperger
 Birth - 4 January 1866 - Wissembourg, District de Wissembourg, Bas-Rhin, Alsace, France - Margaritha Guggisberg
 - Philipp Kochersberger
 - Christina Hostettler
 - Elisabeth Guggisberg
 - Anna Guggisberg
 - Margaritha Streit
 - Anna Elisabeth Krebs
 - Niklaus Guggisberg
 - Gottlieb Guggisberg
 - Sarah Elizabeth Wiswell
 - Conrad Weaver Kochersperger
 - Rosina Guggisberg
 - Anna Katharina Kochensperger
 Birth - 26 February 1866 - Rothwesten bei Simmershausen, Hessen-Nassau [Nordhessen], Germany Death - 12 March 1866 - Rothwesten bei Simmershausen, Hessen-Nassau [Nordhessen], Germany - Annie [unknown]
 - Maria Guggisberg
 - Albrecht Guggisberg
 Birth - 8 March 1866 - im Rattenholz bei Niedermuhlern, Bern, Switzerland - Emil Franz Guggisberg
 - Margaritha Bräuchi
 - Agnes Ibel
 Birth - 22 March 1866 - St. Georgen an der Goding, Kärnten, Austria - Maria Brönnimann
 Death - 23 March 1866 - in der Fuhren bei Niedermuhlern, Bern, Switzerland - Jakob Guggisberg
 - Anna Elisabeth Bräuchi
 Birth - 26 March 1866 - Hungerzelg bei Niedermuhlern, Bern, Switzerland - Mary Rosina Hunsberger
 Birth - 27 March 1866 - Philadelphia, Philadelphia County, Pennsylvania, USA - Daniel Guggisberg
 Death - 29 March 1866 - Kühweid bei Rüeggisberg, Bern, Switzerland - Rosa Brönnimann
 - Anna Zimmermann
 - Decatur Hersh
 Birth - April 1866 - Philadelphia, Philadelphia County, Pennsylvania, USA - Barclay Harding [I] Warburton
 Birth - 1 April 1866 - Philadelphia, Philadelphia County, Pennsylvania, USA - Henry Kochersberger
 Birth - April 1866 - Newtown, Queens County, New York, USA - Laura McNeil
 - George Kochersberger
 - Elisabeth Zehnder
 Death - 4 April 1866 - im Waldschulhaus bei Zimmerwald, Bern, Switzerland - Emma Louise Kochensperger
 - John C. Engelman
 Death - 7 April 1866 - Philadelphia, Philadelphia County, Pennsylvania, USA - Rosina Bräuchi
 - Morris Deshong
 Death - 19 April 1866 - Whitemarsh, Montgomery County, Pennsylvania, USA - Rosalie Schmutz
 Birth - 26 April 1866 - im mittleren Wald bei Zimmerwald, Bern, Switzerland - George Andrew McNeill
 Death - 28 April 1866 - Whitpain, Montgomery County, Pennsylvania, USA - Adolf Brunner
 - Johannes Guggisberg
 Birth - 1 May 1866 - Fahrni bei Steffisburg, Bern, Switzerland - Heinrich Kochersberger
 Death - May 1866 - New York City, New York, USA - Johanna Magdalena Kochersperger
 Death - 6 May 1866 - Louisville, Jefferson County, Kentucky, USA - William Henry Nader
 Death - 8 May 1866 - Jackson Township, Perry County, Ohio, USA - Rosalie Wiss
 - Johann Guggisberg
 - Jessie Hannis
 Birth - 20 May 1866 - Philadelphia, Philadelphia County, Pennsylvania, USA - Laura Jane Kokensparger
 Birth - 22 May 1866 - Pike Township, Perry County, Ohio, USA - Katharina Streit
 - Anna Blatter
 - Johannes Lang
 - Ludwig Ernst Guggisberg
 - Mary Matilda Kochensparger
 Birth - 17 June 1866 - Jackson Township, Perry County, Ohio, USA - Amelia [unknown]
 - Charles Anderson Cochensparger
 Birth - 3 July 1866 - Lafayette, Jackson Township, Allen County, Ohio, USA - Maria Davis
 Death - 13 July 1866 - Morrisville, Bucks County, Pennsylvania, USA - Rosina Streit
 Birth - 14 July 1866 - Oberscherli bei Köniz, Bern, Switzerland - Johannes Guggisberg
 Death - 19 July 1866 - Fallenbach bei Niedermuhlern, Bern, Switzerland - Jules Emile Guggisberg
 - William Henry [IV] Kochersperger
 Birth - 5 August 1866 - Philadelphia, Philadelphia County, Pennsylvania, USA - Maria Blatter
 - Barbara Guggisberg
 - Rosina Blatter
 - Barbara Bachmann
 - Friedrich Blatter
 - Anna Guggisberg
 Death - 6 September 1866 - im Loch beir Zimmerwald Egg, Zimmerwald, Bern, Switzerland - Anna Karolina Binggeli
 - Gottfried Guggisberg
 - Gottfried Schwarz
 - Mary Elizabeth Yarger
 - Maria Eva Kochersperger
 - Christian Balsiger
 - Maria Guggisberg
 - Henrietta Gugisperg
 Birth - October 1866 - West Farms, Bronx, New York City, New York, USA - Christian Guggisberg
 - Sarah Mathilda Wolf
 Birth - 2 October 1866 - Monday Creek Township, Perry County, Ohio, USA - Emma Minder
 - Friedrich Schwarz
 - Margaritha Brönnimann
 - Anna Maria Guggisberg
 - Karl Guggisberg
 - Daniel [II] Kochersperger
 Death - 21 October 1866 - Rittershoffen, Kreis Weissenburg, Niederrhein, Alsace, France - Christian Guggisberg
 - Maria Rosina Schenk
 - Edward S. Tustin
 Birth - November 1866 - Philadelphia, Philadelphia County, Pennsylvania, USA - Margaritha Guggisberg
 Birth - 2 November 1866 - in der Bergweid bei Obermuhlern, Bern, Switzerland - Rosina Stucker
 - Karoline Margaritha Streit
 - Anna Schmutz
 - Albrecht Streit
 - John Frederick Webster
 - Polly Ann Lancaster
 - Margaritha Guggisberg
 - Friedrich Guggisberg
 Birth - 21 December 1866 - an der unteren Halten bei Obermuhlern, Bern, Switzerland - Anna Brönnimann

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