Tierney is a distinctive girls' name in England & Wales, ranking #699 in 2003 with 40 recorded births. The name reached its all-time peak in 2000 with 54 births ranking #524. Since 1996, the popularity has increased by 110.5%. In 2003, approximately 1 in every 6,967 girls born was named Tierney. FALLING Recent data shows the name is currently falling.