Wiliam is a distinctive boys' name in United States, ranking #7221 in 2003 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 2003, approximately 1 in every 197,527 boys born was named Wiliam. RISING Recent data shows the name is currently rising.