Arnulfo is a distinctive boys' name in United States, ranking #1449 in 1998 with 78 recorded births. The name reached its all-time peak in 1996 with 105 births ranking #1127. Since 1996, the popularity has decreased by 25.7%. In 1998, approximately 1 in every 24,504 boys born was named Arnulfo. RISING Recent data shows the name is currently rising.