Wiliam is a distinctive boys' name in United States, ranking #5277 in 1997 with 12 recorded births. This places Wiliam in the top 49% 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. Since 1996, the popularity has increased by 100.0%. In 1997, approximately 1 in every 157,091 boys born was named Wiliam. RISING Recent data shows the name is currently rising.