Ronaldo is a distinctive boys' name in United States, ranking #885 in 1997 with 157 recorded births. The name reached its all-time peak in 1998 with 359 births ranking #552. Since 1996, the popularity has increased by 127.5%. In 1997, approximately 1 in every 12,007 boys born was named Ronaldo. STABLE Recent data shows the name is currently stable.