"Les créations jacsam" is likely a reference to the fictional organization in Eco's book. It may represent a play on words or a made-up term within the context of the novel. The meaning would depend on how Eco chooses to develop this concept in his story.
Umberto Eco
There seems to be a mix-up of names. Umberto Eco was a well-known Italian author who wrote best-selling novels such as "The Name of the Rose" and "Foucault's Pendulum." However, there is no known author by the name of Janin-Rivolin Yoccos.
Umberto Sacripante's birth name is Sacripanti, Umberto.
Umberto Caglini's birth name is Umberto Caglini.
Umberto Magnani's birth name is Umberto Magnani Netto.
Umberto Buscioni has written: 'Umberto Buscioni, 1963-1973'
Umberto Paradisi's birth name is Umberto Mario Lodovico Paradisi.
Umberto Giordano's birth name is Umberto Menotti Maria Giordano.
Umberto Mastroianni has written: 'Umberto Mastroianni' -- subject(s): Exhibitions
Umberto Agnelli died in Italy.
Umberto Raho is 6' 1".
Umberto Pelizzari is 189 cm.