Richard was known to his friends and colleagues as Rex Mundi, a name also once used for a Dark Horse Comics character.
Cathars rejected the Old Testament and its God, who they named Rex Mundi (Latin for "king of the world"), who they saw as a blind usurper who demanded fearful obedience and worship and who, under the most false pretexts, tormented and murdered those whom he called "his children" They proclaimed that there was a higher God — the True God — and Jesus was his messenger.
Rex Stout | Rex Ryan | Rex Harrison | Rex Allen | Rex Hunt | Erreway en Grand Rex | Rex Hagon | Rex Beach | Harmonia Mundi | Rex Records | Rex Murphy | Rex (Live at the Fillmore) | Rex Applegate | Rex | SS Rex | Rex Williams | Rex Linn | Rex Lassalle | SS ''Rex'' | Simon Rex | Rex Whistler | Rex Wailes | Rex Van de Kamp | Rex T. Barber | Rex Sorensen | Rex Salas | Rex Reed | Rex Mundi | Rex Morgan, M.D. | Rex E. Lee |