The Spirits' Book
Book Two - The Spirit World
Chapter IX - Intervention of Spirits on the Physical World
Guardian Angels: Protective, Familiar and Sympathetic Spirits
505. Are the guardian angels who assume well-known names always the individuals who had those names?
“No, but they are like-minded spirits, and are often sent by their command. You require names, so they assume a name that will inspire you with confidence. When you are unable to execute a command in person, you send someone on your behalf.”