From Dacia
Daci is a shortened form of Dacia, a name referring to the ancient Roman province of Dacia, which corresponds to modern-day Romania and Moldova. It is also occasionally used as a diminutive of names like Daciana or Candace. In modern usage, it functions as a rare, breezy nickname-style choice.
Less common today
Daci isn't in the latest US Top 1000. It last peaked at #10,245 in 2000.
US births per 5-year period, 1990βpresent (SSA data).