This web site remembers the  Società per Azioni Fantasio, created by Enrico, Giorgio and Elio Pescarolo to preserve their shops in Florence and in Genova from the italian lows against jews. The name was probably a joke inspired from some of the following operas.

The  name Fantasio in literature and music

17819-herouard-1930-offenbach-dance-hprints-com Fantasio by Offenbach
fantasio_Offenbach The libretto of the opera
Fantasio (Paris. 1874)   Fantasio (Paris. 1874) Source: gallica.bnf.fr
Fantasio (Paris)   Fantasio (Paris)
Source: gallica.bnf.fr
37047-charles-gesmar-1917 Image from Fantasio (Paris)
Source: gallica.bnf.fr
spirou e fantasio Spirou and Fantasio in New York font: Gallica