Tiannah is a distinctive girls' name in United States, ranking #10679 in 2000 with 9 recorded births. This places Tiannah in the bottom 40% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2007 with 29 births ranking #5087. Since 1996, the popularity has decreased by 25.0%. In 2000, approximately 1 in every 201,775 girls born was named Tiannah. FALLING Recent data shows the name is currently falling.