Brockhaus-1911: In perpetuam memoriam · In memoriam · Ad perpetuam memoriam
Herder-1854: ad perpetuam rei memoriam
Meyers-1905: In perpetŭam reĭ memorĭam · Post homĭnum memorĭam · Ad perpetŭam memorĭam · In memorĭam
Pierer-1857: Post homĭnum memorĭam · In perpetŭam rei memorĭam · Ad perpetuam memoriam