Arnulfo is a distinctive boys' name in United States, ranking #2826 in 2010 with 42 recorded births. The name reached its all-time peak in 1996 with 105 births ranking #1127. Since 1996, the popularity has decreased by 60.0%. In 2010, approximately 1 in every 45,676 boys born was named Arnulfo. RISING Recent data shows the name is currently rising.