Arnoldo is a distinctive boys' name in United States, ranking #1881 in 2004 with 65 recorded births. The name reached its all-time peak in 1997 with 88 births ranking #1295. Since 1996, the popularity has decreased by 19.8%. In 2004, approximately 1 in every 30,535 boys born was named Arnoldo. RISING Recent data shows the name is currently rising.