Where does “xứ Thanh” come from?

xứ Thanh (Vietnamese) comes from Vietnamese xứ, from French sou, from Latin solidus, from Proto-Italic soliðos, from Proto-Indo-European solh₂-i-dʰ-o-s, from Proto-Indo-European solh₂- — whole.

Ancestry of “xứ Thanh”, step by step

xứ Thanh traces back through two separate lines of ancestry.

via Vietnamese xứ

StepLanguageWordMeaning
1Vietnamesexứa land
2Frenchsousou; money; cash; cent
3Latinsolidussolid; A solidus: a Roman ~23-carat gold coin...
4Proto-Italicsoliðos—
5Proto-Indo-Europeansolh₂-i-dʰ-o-sentire
6Proto-Indo-Europeansolh₂-whole

via Vietnamese thành

StepLanguageWordMeaning
1Vietnamesethànhinto; to achieve one's goal, to become, to turn...
2Chinese青—
3Proto-Sino-Tibetan*sreŋto live
Every word from Proto-Indo-European solh₂- →Every word from Proto-Indo-European solh₂-i-dʰ-o-s →Every word from Proto-Italic soliðos →