- "Give it up. It's never going to happen."
- —Bertrand de Pensées-Profondes on attempting to reverse death.[src]
Bertrand de Pensées-Profondes was a noted and highly-regarded wizarding philosopher. He was the author of the celebrated work A Study into the Possibility of Reversing the Actual and Metaphysical Effects of Natural Death, with Particular Regard to the Reintegration of Essence and Matter.
Bertrand is a French form of Bertram, which derives from the Germanic elements beraht, "bright," and hramn, "raven." Bertrand Russell was an influential British philosopher. Pensées-Profondes is French for "deep thoughts."
- The Tales of Beedle the Bard (Mentioned only)