Casimiro is a distinctive boys' name in United States, ranking #9039 in 2019 with 8 recorded births. This places Casimiro in the bottom 36% 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. Since 1996, the popularity has decreased by 20.0%. In 2019, approximately 1 in every 224,170 boys born was named Casimiro. FALLING Recent data shows the name is currently falling.