persona non grata

Where does the word "persona non grata" come from? It comes from Latin persona non grata, and was adopted directly into English (1900s).

Persona non grata’s story begins in Latin: persona non grata meant “an unwelcome person.” An unwelcome person, from persona (person), non (not), and gratus (pleasing). It reached English by 1900s as persona non grata. The Vienna Convention of 1961 lets states declare a diplomat persona non grata. Today, persona non grata means a person who is not welcome somewhere, especially in a diplomatic setting.

1. Stage 1 · Latin · ancient persona non grata "an unwelcome person", an unwelcome person, from persona (person), non (not), and gratus (pleasing).
2. Stage 2 · English · 1900s persona non grata "a person who is not welcome, especially in a diplomatic context", the Vienna Convention of 1961 lets states declare a diplomat persona non grata.