Arnulfo is a distinctive boys' name in United States, ranking #1395 in 1999 with 84 recorded births. The name reached its all-time peak in 1996 with 105 births ranking #1127. Since 1996, the popularity has decreased by 20.0%. In 1999, approximately 1 in every 22,858 boys born was named Arnulfo. RISING Recent data shows the name is currently rising.