Tierney is a distinctive boys' name in United States, ranking #10401 in 1996 with 5 recorded births. This places Tierney in the bottom 1% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2006 with 8 births ranking #9490. In 1996, approximately 1 in every 378,847 boys born was named Tierney. STABLE Recent data shows the name is currently stable.