Tierney is a distinctive girls' name in England & Wales, ranking #840 in 2004 with 32 recorded births. The name reached its all-time peak in 2000 with 54 births ranking #524. Since 1996, the popularity has increased by 68.4%. In 2004, approximately 1 in every 8,933 girls born was named Tierney. FALLING Recent data shows the name is currently falling.