Arnoldo is a distinctive boys' name in United States, ranking #1782 in 2003 with 67 recorded births. The name reached its all-time peak in 1997 with 88 births ranking #1295. Since 1996, the popularity has decreased by 17.3%. In 2003, approximately 1 in every 29,482 boys born was named Arnoldo. RISING Recent data shows the name is currently rising.