Kerwin is a distinctive boys' name in United States, ranking #5567 in 2007 with 16 recorded births. The name reached its all-time peak in 1996 with 27 births ranking #2795. Since 1996, the popularity has decreased by 40.7%. In 2007, approximately 1 in every 129,702 boys born was named Kerwin. FALLING Recent data shows the name is currently falling.