Arnoldo is a distinctive boys' name in United States, ranking #2131 in 2005 with 57 recorded births. The name reached its all-time peak in 1997 with 88 births ranking #1295. Since 1996, the popularity has decreased by 29.6%. In 2005, approximately 1 in every 35,038 boys born was named Arnoldo. RISING Recent data shows the name is currently rising.