Arnulfo is a distinctive boys' name in United States, ranking #2071 in 2007 with 66 recorded births. The name reached its all-time peak in 1996 with 105 births ranking #1127. Since 1996, the popularity has decreased by 37.1%. In 2007, approximately 1 in every 31,443 boys born was named Arnulfo. RISING Recent data shows the name is currently rising.