Arnoldo is a distinctive boys' name in United States, ranking #3441 in 2017 with 32 recorded births. The name reached its all-time peak in 1997 with 88 births ranking #1295. Since 1996, the popularity has decreased by 60.5%. In 2017, approximately 1 in every 57,822 boys born was named Arnoldo. RISING Recent data shows the name is currently rising.