Tiarna is a distinctive girls' name in England & Wales, ranking #965 in 2010 with 35 recorded births. The name reached its all-time peak in 2008 with 37 births ranking #878. Since 1996, the popularity has increased by 600.0%. In 2010, approximately 1 in every 9,172 girls born was named Tiarna. FALLING Recent data shows the name is currently falling.