Triple, three, or pure
Treana is a rare name likely derived from the Latin 'tri' meaning three, or as a modern variant of Trina, which stems from the Greek Katherine meaning pure. It is often used as a creative elaboration of shorter names like Trea or Bree.
Less common today
Treana isn't in the latest US Top 1000. It last peaked at #6,180 in 1996.
US births per 5-year period, 1990βpresent (SSA data).