He is said to have been a patrician of Asti and a subaltern officer in the imperial army.

[2] Later legends made Secundus a member of the Theban Legion.

A more elaborate legend states that he was a young man of noble lineage who visited the jails of Asti.

His friend Sapricius attempted to make him abjure his newfound faith.

The codex called the Codice della Catena depicts Octavius, Adventor, Solutor, Maximus of Turin, John the Baptist, and Secundus of Asti.