Wiliam is a distinctive boys' name in United States, ranking #7022 in 2002 with 10 recorded births. The name reached its all-time peak in 2008 with 20 births ranking #4893. Since 1996, the popularity has increased by 66.7%. In 2002, approximately 1 in every 194,147 boys born was named Wiliam. RISING Recent data shows the name is currently rising.