Ronaldo is a distinctive boys' name in United States, ranking #1005 in 2009 with 196 recorded births. The name reached its all-time peak in 1998 with 359 births ranking #552. Since 1996, the popularity has increased by 184.1%. In 2009, approximately 1 in every 10,119 boys born was named Ronaldo. STABLE Recent data shows the name is currently stable.