Note that the index numbers are only technical numbers which have no persistence. After a new system generation is done, all of them are invalid. To generate a persistent link, use the name.Use the URL:
http://ww-person.com/cgi-bin/l3/LANG=germ/F=Isabelle/N=de@Plancy,@de@Chauffour,@de@Poligny,@de@Bagneux,@de@Marolles-Lez-Bailly,@de@Chemilly@et@de@Saint-Cyr-Les-Colons
alternatively: /cgi-bin/llmult/LANG=germ/P=6044426