Willis is a distinctive boys' name in United States, ranking #1187 in 1999 with 109 recorded births. This places Willis in the top 10% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 1996 with 113 births ranking #1078. In 1999, approximately 1 in every 17,615 boys born was named Willis. FALLING Recent data shows the name is currently falling.