Where does “tên đệm” come from?

tên đệm (Vietnamese) comes from Vietnamese tên, from Proto-Slavic *tъ, from Proto-Balto-Slavic tas, from Proto-Indo-European só — this; that.

tên đệm (Vietnamese): middle name

Definitions

  1. middle name

Ancestry of “tên đệm”, step by step

tên đệm traces back through two separate lines of ancestry.

via Vietnamese tên

StepLanguageWordMeaning
1Vietnamesetêngiven name; name; person
2Proto-Slavic*tъ—
3Proto-Balto-Slavictasthat
4Proto-Indo-Europeansóthis; that

via Vietnamese đệm

StepLanguageWordMeaning
1Vietnameseđệmmattress; cushion
Every word from Proto-Indo-European só →Every word from Proto-Balto-Slavic tas →Every word from Proto-Slavic *tъ →