Follower of Christ or heavenly
Tianni is often considered a modern diminutive or creative variation of Tiana or Tatiana. It likely shares roots with the Latin 'Tatianus', a Roman family name, or may be interpreted as a blend of 'Ti-' and 'Annie', sometimes associated with the word for 'heavenly' in various linguistic contexts.
Less common today
Tianni isn't in the latest US Top 1000. It last peaked at #8,701 in 2002.
US births per 5-year period, 1990βpresent (SSA data).