Arnoldo is a distinctive boys' name in United States, ranking #4364 in 2018 with 23 recorded births. The name reached its all-time peak in 1997 with 88 births ranking #1295. Since 1996, the popularity has decreased by 71.6%. In 2018, approximately 1 in every 78,934 boys born was named Arnoldo. RISING Recent data shows the name is currently rising.