Arnoldo is a distinctive boys' name in United States, ranking #1515 in 1998 with 72 recorded births. The name reached its all-time peak in 1997 with 88 births ranking #1295. Since 1996, the popularity has decreased by 11.1%. In 1998, approximately 1 in every 26,546 boys born was named Arnoldo. RISING Recent data shows the name is currently rising.