Ronaldo is a distinctive boys' name in United States, ranking #759 in 2004 with 240 recorded births. The name reached its all-time peak in 1998 with 359 births ranking #552. Since 1996, the popularity has increased by 247.8%. In 2004, approximately 1 in every 8,270 boys born was named Ronaldo. STABLE Recent data shows the name is currently stable.