Ronaldo is a distinctive boys' name in United States, ranking #552 in 1998 with 359 recorded births. The name reached its all-time peak in 1998 with 359 births ranking #552. Since 1996, the popularity has increased by 420.3%. In 1998, approximately 1 in every 5,324 boys born was named Ronaldo. STABLE Recent data shows the name is currently stable.