A calque of Latin beatae memoriae, possibly a calque of Hebrew זכרונו\ה\ם\ן לברכה (zikhronó/á/ám/án livrakhá, “memory-of-him/her/them to blessing”), ז״ל (Z.L.).
of blessed memory (not comparable)
- Honorific epithet used parenthetically to mark a beloved person as being deceased.
2002, Neil Gaiman, American Gods, pages 193:
- Thus, McDonald's, Wal-Mart, FW Woolworth (of blessed memory): store brands maintained and visible across the entire country.