Ronaldo is a distinctive boys' name in United States, ranking #756 in 2003 with 236 recorded births. The name reached its all-time peak in 1998 with 359 births ranking #552. Since 1996, the popularity has increased by 242.0%. In 2003, approximately 1 in every 8,370 boys born was named Ronaldo. STABLE Recent data shows the name is currently stable.