Sheehan is a distinctive boys' name in United States, ranking #11249 in 2005 with 6 recorded births. This places Sheehan in the bottom 16% 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 2005, approximately 1 in every 332,858 boys born was named Sheehan. FALLING Recent data shows the name is currently falling.