Tierney is a distinctive girls' name in England & Wales, ranking #577 in 1998 with 46 recorded births. The name reached its all-time peak in 2000 with 54 births ranking #524. Since 1996, the popularity has increased by 142.1%. In 1998, approximately 1 in every 6,286 girls born was named Tierney. FALLING Recent data shows the name is currently falling.