Arnulfo is a distinctive boys' name in United States, ranking #1415 in 2001 with 88 recorded births. The name reached its all-time peak in 1996 with 105 births ranking #1127. Since 1996, the popularity has decreased by 16.2%. In 2001, approximately 1 in every 22,078 boys born was named Arnulfo. RISING Recent data shows the name is currently rising.