Arnulfo is a distinctive boys' name in United States, ranking #3762 in 2025 with 29 recorded births. The name reached its all-time peak in 1996 with 105 births ranking #1127. Since 1996, the popularity has decreased by 72.4%. In 2025, approximately 1 in every 58,899 boys born was named Arnulfo. RISING Recent data shows the name is currently rising.