Arnoldo is a distinctive boys' name in United States, ranking #1817 in 2001 with 61 recorded births. The name reached its all-time peak in 1997 with 88 births ranking #1295. Since 1996, the popularity has decreased by 24.7%. In 2001, approximately 1 in every 31,850 boys born was named Arnoldo. RISING Recent data shows the name is currently rising.