Arnulfo is a distinctive boys' name in United States, ranking #2382 in 2009 with 54 recorded births. The name reached its all-time peak in 1996 with 105 births ranking #1127. Since 1996, the popularity has decreased by 48.6%. In 2009, approximately 1 in every 36,728 boys born was named Arnulfo. RISING Recent data shows the name is currently rising.