Teaghan is a distinctive boys' name in United States, ranking #7451 in 2015 with 11 recorded births. This places Teaghan in the bottom 47% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2015 with 11 births ranking #7451. In 2015, approximately 1 in every 174,205 boys born was named Teaghan. FALLING Recent data shows the name is currently falling.