Arnoldo is a distinctive boys' name in United States, ranking #4072 in 2013 with 24 recorded births. The name reached its all-time peak in 1997 with 88 births ranking #1295. Since 1996, the popularity has decreased by 70.4%. In 2013, approximately 1 in every 78,802 boys born was named Arnoldo. RISING Recent data shows the name is currently rising.