Where does “sông Đồng Nai” come from?

sông Đồng Nai (Vietnamese) comes from Vietnamese Đồng Nai, from Vietnamese đồng, from Vietnamese đất, from Proto-Vietic tət.

Ancestry of “sông Đồng Nai”, step by step

sông Đồng Nai traces back through two separate lines of ancestry.

via Vietnamese Đồng Nai

StepLanguageWordMeaning
1VietnameseĐồng Nai—
2Vietnameseđồngfield; medium; sorcerer; copper
3Vietnameseđấtearth; soil; dirt; land
4Proto-Vietictət—

via Vietnamese sống

StepLanguageWordMeaning
1Vietnamesesốnga spine; to live; living
2Proto-Vietick-roːŋʔback of the blade; alive; raw
3Proto-Mon-Khmerruŋʔ—
Every word from Proto-Vietic tət →Every word from Vietnamese đất →Every word from Vietnamese đồng →