vulgātorm (genitivevulgātōris, femininevulgātrīx); third declension
divulger, one that divulges information, makes something well-known
Vulgator secretorum non credi potest
The divulger of secrets is not able to be trusted
1844, Jacques-Paul Migne, Patrologiae cursus completus sive biblioteca universalis, integra, uniformis, commoda, oeconomica, omnium SS. Patrum, doctorum scriptorumque eccelesiasticorum qui ab aevo apostolico ad usque Innocentii III tempora floruerunt (quotation in Latin; overall work in Latin), Cambridge, Massachusetts: Parisiis, pages 171-172: