Willem is a distinctive boys' name in United States, ranking #2342 in 2017 with 56 recorded births. The name reached its all-time peak in 2003 with 122 births ranking #1208. Since 1996, the popularity has increased by 21.7%. In 2017, approximately 1 in every 33,041 boys born was named Willem. STABLE Recent data shows the name is currently stable.