Ronaldo is a distinctive boys' name in United States, ranking #970 in 2010 with 204 recorded births. The name reached its all-time peak in 1998 with 359 births ranking #552. Since 1996, the popularity has increased by 195.7%. In 2010, approximately 1 in every 9,404 boys born was named Ronaldo. STABLE Recent data shows the name is currently stable.