Wiliam is a distinctive boys' name in United States, ranking #6412 in 2009 with 14 recorded births. The name reached its all-time peak in 2008 with 20 births ranking #4893. Since 1996, the popularity has increased by 133.3%. In 2009, approximately 1 in every 141,665 boys born was named Wiliam. RISING Recent data shows the name is currently rising.