Wiliam is a distinctive boys' name in United States, ranking #8972 in 1996 with 6 recorded births. This places Wiliam in the bottom 15% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2008 with 20 births ranking #4893. In 1996, approximately 1 in every 315,706 boys born was named Wiliam. RISING Recent data shows the name is currently rising.