Arnaldo is a distinctive boys' name in United States, ranking #7182 in 2016 with 11 recorded births. The name reached its all-time peak in 2001 with 35 births ranking #2683. Since 1996, the popularity has decreased by 62.1%. In 2016, approximately 1 in every 172,474 boys born was named Arnaldo. FALLING Recent data shows the name is currently falling.