Ronaldo is a distinctive boys' name in United States, ranking #889 in 2000 with 177 recorded births. The name reached its all-time peak in 1998 with 359 births ranking #552. Since 1996, the popularity has increased by 156.5%. In 2000, approximately 1 in every 11,096 boys born was named Ronaldo. STABLE Recent data shows the name is currently stable.