Wiliam is a distinctive boys' name in United States, ranking #5978 in 2012 with 15 recorded births. This places Wiliam in the top 42% 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 150.0%. In 2012, approximately 1 in every 126,442 boys born was named Wiliam. RISING Recent data shows the name is currently rising.