Translations for influential in French

Here are paragraphs from public domain books translated:

The intervention of my excellent friend was decisive. Pronounced by her, the wife of an influential official, the name of Berlat became really my own, and gave me an identity that no mere suspicion could affect. The commissary arose, and said:	L’intervention de mon excellente amie fut décisive. Prononcé par elle, la femme d’un personnage influent, ce nom de Berlat devenait réellement le mien et me conférait une identité qu’aucun soupçon ne pouvait atteindre. Le commissaire se leva :
The Extraordinary Adventures of Arsene Lupin, Gentleman Burglar, by Maurice Leblanc	Arsène Lupin gentleman-cambrioleur, de Maurice Leblanc