On July 30, 1956, Prof. Siebert married Margaret Charlotte Siebert, nee Noyes.   The matrimonial ceremonies were performed in Dieburg, Hessen, Germany.   Margaret was born November 12, 1929, in Washington D.C., USA.   She died of cancer on October 20, 1978, in London, Ontario, Canada.  

Children:
Rosemarie, Margaret	Karl, Josef	Maria, Elisabeth	Thomas, Bruno
Stephan, Georg	Agnes, Maria	Jean, Marie
Grandchildren:
Meaghan George	Margaret George	Nicholas George	Sally Siebert
Lauren Siebert	Kyle Siebert	Christopher Barbeau	Alexandra Barbeau
Jacob Haering	Paul Haering	Tatem Siebert	Christopher-Matthew Irving
Ryan Irving	Grace Marget Irving
Great Grandchildren:
William Joseph Robinson