from The American Heritage® Dictionary of the English Language, 4th Edition
- A historical region of southeast Asia on the Gulf of Tonkin, an arm of the South China Sea, now forming most of northern Vietnam. It was part of French Indochina from 1887 to 1946.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- proper n. A surname.
From a medieval diminutive form of the given name Thomas. (Wiktionary)