Tiana is a modern American invention — possibly a diminutive of Tatiana, Christiana, or simply a creative formation. The film, set in 1920s Jazz Age New Orleans, is Disney's only animated feature directed by Black creative leadership (John Musker and Ron Clements with Princess and the Frog soundtrack by Randy Newman); the 2024 Disneyland and Disney World attraction Tiana's Bayou Adventure opened to acclaim. Tiana Major9 (born 1995) — British R&B singer.
Tiana does not currently appear in the US Social Security Administration's top 1,000 girls' names, so we don't publish a US rank or birth count for it. That says nothing about the name's standing elsewhere in the world — only that it sits outside the ranked US data we rely on.
In Pythagorean numerology the letters of Tiana reduce to 9, The Giver. This is a traditional interpretive system, not a factual claim about the name.