Dai is a Welsh male name, a diminutive of Dafydd, the Welsh form of David which comes from Hebrew meaning “beloved”. I’ve also seen it listed as being derived from an old Celtic word dei meaning “to shine”. Dai is also a Japanese male name with a variety of meanings depending on the kanji used:

  • dai 大 “big, large”;
  • dai 太 “plump, thick, big around, fat”;
  • da 打 “strike, hit, knock, pound; dozen” + i 意 “idea; mind; heart; desire” (打意);
  • dai 太 “plump; thick; big around; fat” + i 威 “idea; mind; heart; desire” (太威);
  • dai 戴 “to be crowned with; live under (a ruler); receive”

There are other meanings depending on the kanji used. Written in hiragana it’s だい. Dai is also a short form of names such as Daisuke, Daiki, or Daito. Dai is also a Japanese surname as well as a Chinese surname.

Dai is also a Swahili word meaning “demand, claim”.

Origin: Hebrew, Japanese, Chinese, Swahili




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