Tiarna is a distinctive girls' name in England & Wales, ranking #878 in 2008 with 37 recorded births. The name reached its all-time peak in 2008 with 37 births ranking #878. Since 1996, the popularity has increased by 640.0%. In 2008, approximately 1 in every 8,534 girls born was named Tiarna. FALLING Recent data shows the name is currently falling.