Arnoldo is a distinctive boys' name in United States, ranking #2816 in 2012 with 42 recorded births. The name reached its all-time peak in 1997 with 88 births ranking #1295. Since 1996, the popularity has decreased by 48.1%. In 2012, approximately 1 in every 45,158 boys born was named Arnoldo. RISING Recent data shows the name is currently rising.