Tierney is a distinctive girls' name in England & Wales, ranking #524 in 2000 with 54 recorded births. The name reached its all-time peak in 2000 with 54 births ranking #524. Since 1996, the popularity has increased by 184.2%. In 2000, approximately 1 in every 5,059 girls born was named Tierney. FALLING Recent data shows the name is currently falling.