"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 Buscioni has written: 'Umberto Buscioni, 1963-1973'
Umberto Magnani's birth name is Umberto Magnani Netto.
Umberto Mastroianni has written: 'Umberto Mastroianni' -- subject(s): Exhibitions
Umberto Paradisi's birth name is Umberto Mario Lodovico Paradisi.
Umberto Giordano's birth name is Umberto Menotti Maria Giordano.
Umberto Agnelli died in Italy.
Umberto Mozzoni died in 1983.
Umberto Mozzoni was born in 1904.