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=Umberto/N=Incisa@dei@Baroni@di@Santa@Giulia@e@Niosa
Umberto Incisa dei Baroni di Santa Giulia e Niosa
alternatively: /cgi-bin/llmult/LANG=germ/P=12065581