In answer to their inquiries, he said that he had never known his real name; that his father had been in the habit of calling him d'Entrevergues de Rougon de Caille; that he believed he really was twenty-five years old, although two months previously he had stated his age to be twenty-three; that he had never known his godfather or his godmother; that only ten years had elapsed since he left Manosque; that he did not know the name of the street nor the quarter of the town in which his father's house was situated; that he could not tell the number of rooms it contained; and that even if he were to see it again he could not recognise it.

The eldest son of the Sieur de Caille was called Isaac and not André; the soldier took the name of d'Entrevergues, and gave it to the father, while the family name was Brun de Castellane; he called his mother Susanne de Caille, whereas her maiden name was Judith le Gouche.

The soldier was nothing loth to accept this advice, and after being three weeks under the tutelage of the Jesuits, he publicly abjured the Calvinistic creed in the Cathedral of Toulon, on the 10th of June 1699. In his act of abjuration he took the name of André d'Entrevergues, the son of Scipio d'Entrevergues, Sieur de Caille, and of Madame Susanne de Caille, his wife.