Ronaldo is a distinctive boys' name in United States, ranking #670 in 1999 with 253 recorded births. The name reached its all-time peak in 1998 with 359 births ranking #552. Since 1996, the popularity has increased by 266.7%. In 1999, approximately 1 in every 7,589 boys born was named Ronaldo. STABLE Recent data shows the name is currently stable.