Willo is a distinctive girls' name in United States, ranking #12159 in 2012 with 9 recorded births. This places Willo in the bottom 38% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2016 with 13 births ranking #8848. In 2012, approximately 1 in every 195,638 girls born was named Willo. RISING Recent data shows the name is currently rising.