Arnulfo is a distinctive boys' name in United States, ranking #1673 in 2004 with 77 recorded births. The name reached its all-time peak in 1996 with 105 births ranking #1127. Since 1996, the popularity has decreased by 26.7%. In 2004, approximately 1 in every 25,777 boys born was named Arnulfo. RISING Recent data shows the name is currently rising.