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=Martin@Domingo/N=de@Guzmán@y@Niño@*@de@Montealegre@*@de@Meneses@y@de@Villamer
Martin Domingo de Guzmán y Niño * de Montealegre * de Meneses y de Villamer
alternatively: /cgi-bin/llmult/LANG=germ/P=20015106
Martin Domingo de Guzmán y Niño * de Montealegre * de Meneses y de Villamer