At the Senate’s request to produce a declaration of religion at birth, Enrico Catellani presented a certificate stating that “signor Levi Cattelan Enrico has relinquished the surname Levi and changed the other surname from Cattelan to Cattelani”.
But the official documents clearly show Catellani, a change authorised by Reale decreto of 1900.

But on this aspect of the jurist’s life, most of the documentary sources speak of the history and the bibliography, which highlight two choices.
History highlights the choice at his birth within the Levi Cattelan family of the name Enrico Abram Jechiel.
The bibliography highlights the jurist’s own choice of signing E.L. Catellani in works regarding his professional activities up until 1889; while in two 1879 publications, L'Economico e Venezia e le sue letterate, of a humanistic nature, he had already adopted Enrico Catellani.
After 1900, the jurist finally adopted the form of Enrico Catellani, from which it may be possible to interpret other personal, existential and spiritual choices: leaving the Comunità ebraica.
Of his conversion to Unitarian Christianity, there is evidence in the Istituto di Scienze, Lettere ed arti of Venice archival documents related to racial discrimination.