Tierney is a distinctive girls' name in England & Wales, ranking #928 in 2006 with 31 recorded births. The name reached its all-time peak in 2000 with 54 births ranking #524. Since 1996, the popularity has increased by 63.2%. In 2006, approximately 1 in every 9,653 girls born was named Tierney. FALLING Recent data shows the name is currently falling.