Coi is a distinctive girls' name in United States, ranking #18143 in 2008 with 5 recorded births. This places Coi in the bottom 11% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2023 with 23 births ranking #5422. In 2008, approximately 1 in every 378,144 girls born was named Coi. FALLING Recent data shows the name is currently falling.