Arnulfo is a distinctive boys' name in United States, ranking #2548 in 2011 with 48 recorded births. The name reached its all-time peak in 1996 with 105 births ranking #1127. Since 1996, the popularity has decreased by 54.3%. In 2011, approximately 1 in every 39,562 boys born was named Arnulfo. RISING Recent data shows the name is currently rising.