Arnaldo is a distinctive boys' name in United States, ranking #2683 in 2001 with 35 recorded births. The name reached its all-time peak in 2001 with 35 births ranking #2683. Since 1996, the popularity has increased by 20.7%. In 2001, approximately 1 in every 55,509 boys born was named Arnaldo. FALLING Recent data shows the name is currently falling.