Sheehan is a distinctive boys' name in United States, ranking #5956 in 2001 with 12 recorded births. This places Sheehan in the top 48% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2001 with 12 births ranking #5956. In 2001, approximately 1 in every 161,903 boys born was named Sheehan. FALLING Recent data shows the name is currently falling.