Arnoldo is a distinctive boys' name in United States, ranking #4086 in 2015 with 25 recorded births. The name reached its all-time peak in 1997 with 88 births ranking #1295. Since 1996, the popularity has decreased by 69.1%. In 2015, approximately 1 in every 76,650 boys born was named Arnoldo. RISING Recent data shows the name is currently rising.