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=Iñigo/N=López@de@Mendoza@y@Pimentel@*@del@Infantado@*@de@Santillana,@de@Argüeso@y@Campoo@*@del@Real@de@Manzanares@y@de@Saldaña
alternatively: /cgi-bin/llmult/LANG=germ/P=20015196