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=deu/F=Philippe@V/N=de@Plancy,@de@Rigny-Le-Ferron@*@de@Praslin
Philippe V de Plancy, de Rigny-Le-Ferron * de Praslin
alternatively: /cgi-bin/llmult/LANG=germ/P=6044406