Arnoldo is a distinctive boys' name in United States, ranking #1574 in 1999 with 70 recorded births. The name reached its all-time peak in 1997 with 88 births ranking #1295. Since 1996, the popularity has decreased by 13.6%. In 1999, approximately 1 in every 27,430 boys born was named Arnoldo. RISING Recent data shows the name is currently rising.