Arnulfo is a distinctive boys' name in United States, ranking #3516 in 2015 with 31 recorded births. The name reached its all-time peak in 1996 with 105 births ranking #1127. Since 1996, the popularity has decreased by 70.5%. In 2015, approximately 1 in every 61,815 boys born was named Arnulfo. RISING Recent data shows the name is currently rising.