Moo is a distinctive girls' name in United States, ranking #14706 in 2021 with 6 recorded births. This places Moo in the bottom 17% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2013 with 7 births ranking #14173. In 2021, approximately 1 in every 273,285 girls born was named Moo. FALLING Recent data shows the name is currently falling.