I am grateful to the following people who have supplied me with information on especially the living family members:

The Netherlands:
Roel Wischhoff
Tjitske Ogilvy-Wischhoff
Wendy Roodenburg-Wischhoff
Jenifer Wischhoff
Thom en Anneke Wischhoff  
Stan Wischhoff
Irene Wischhoff-Terlingen
 

Germany:
Günter Koopmann-Wischhoff

Dr. Sylvia Moehle
Corinna Lohr
Cord Baetjer
 

the United States:
Douglas W. Wischoff II
Dottie Hinrichs
Elaine J. Wischhoff-Looft
Dr. Milton J. Wischhoff II

Mike Gawrysiak

Jim Roever
 

Canada:
Bob Spurgeon
Jim and Cindy Wischoff

Belgium
Jacques Wischhoff.