The deep influence of de Groot on Dutch topology may be seen in the complex academic genealogy of his namesake Johannes Antonius Marie de Groot (shown in the illustration): the later de Groot, a 1990 Ph.D. in topology, is the senior de Groot's academic grandchild, great-grandchild, and great-great-grandchild via four different paths of academic supervision.
The deep influence of de Groot on Dutch topology can be seen in the complex family tree of his namesake, Johannes Antonius Marie de Groot (illustrated): the later de Groot, a 1990 Ph.D. in topology, is a descendant of the senior de Groot through multiple academic connections.