Where does “Malachi” come from?

Malachi comes from Hebrew מַלְאָכִי, derived from Hebrew מַלְאָךְ meaning messenger or angel.

Ancestry of “Malachi”, step by step

Step	Language	Word	Meaning
1	Latin	Malachias	—
2	Ancient Greek	Μαλαχίας	—
3	Hebrew	מַלְאָכִי	—
4	Hebrew	מַלְאָךְ	messenger; angel; messenger; ambassadors

Malachi — Etymology, Origin & Word History | Etymology Explorer