The story
- Hebrew · derived fromזיכרונו לברכה“memory-of-him/her/them to blessing”
- Latin · derived frombeatae memoriae
- English todayof blessed memory
A calque of Latin beatae memoriae, possibly a calque of Hebrew זיכרונו לברכה (zikhronó/á/ám/án livrakhá, “memory-of-him/her/them to blessing”), ז״ל (Z.L.).
Etymology from Wiktionary, CC BY-SA 4.0.