Willliam is a distinctive boys' name in United States, ranking #10618 in 2025 with 7 recorded births. The name reached its all-time peak in 2006 with 12 births ranking #6888. Since 1996, the popularity has increased by 16.7%. In 2025, approximately 1 in every 244,011 boys born was named Willliam. FALLING Recent data shows the name is currently falling.