Tierney is a distinctive girls' name in England & Wales, ranking #590 in 1999 with 45 recorded births. The name reached its all-time peak in 2000 with 54 births ranking #524. Since 1996, the popularity has increased by 136.8%. In 1999, approximately 1 in every 6,260 girls born was named Tierney. FALLING Recent data shows the name is currently falling.