Williamson is a distinctive boys' name in United States, ranking #8673 in 1999 with 7 recorded births. The name reached its all-time peak in 2025 with 9 births ranking #8873. Since 1996, the popularity has increased by 40.0%. In 1999, approximately 1 in every 274,298 boys born was named Williamson. RISING Recent data shows the name is currently rising.