Selwyn is a distinctive boys' name in United States, ranking #12029 in 2012 with 6 recorded births. The name reached its all-time peak in 1998 with 16 births ranking #4376. Since 1996, the popularity has decreased by 45.5%. In 2012, approximately 1 in every 316,104 boys born was named Selwyn. FALLING Recent data shows the name is currently falling.