Casimiro is a distinctive boys' name in United States, ranking #6529 in 2001 with 10 recorded births. This places Casimiro in the bottom 47% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2000 with 12 births ranking #5627. In 2001, approximately 1 in every 194,283 boys born was named Casimiro. FALLING Recent data shows the name is currently falling.