Arnoldo is a distinctive boys' name in United States, ranking #4399 in 2014 with 22 recorded births. The name reached its all-time peak in 1997 with 88 births ranking #1295. Since 1996, the popularity has decreased by 72.8%. In 2014, approximately 1 in every 87,293 boys born was named Arnoldo. RISING Recent data shows the name is currently rising.