Kerwin is a distinctive boys' name in United States, ranking #3786 in 1998 with 19 recorded births. The name reached its all-time peak in 1996 with 27 births ranking #2795. Since 1996, the popularity has decreased by 29.6%. In 1998, approximately 1 in every 100,596 boys born was named Kerwin. FALLING Recent data shows the name is currently falling.